Indo-Pacific Studies Center
Strategic Brief · Issue #002
Indo-Pacific Strategic Dynamics
Grey Zone & Sub-Threshold — July 2026
RC03 PhilippinesRC04 JapanRC05 Cross-StraitRC07 Maritime Corridors
Key Development
China's simultaneous physical assault on Philippine personnel at Second Thomas Shoal, sustained water cannon attacks at Scarborough Shoal, a first-ever SLBM test into the Pacific, and permanent CCG patrol establishment east of Taiwan mark July 2026 as the most kinetically active grey-zone month on record across the Indo-Pacific.
The Indo-Pacific grey zone has shifted from coercive manoeuvre toward direct physical contact and nuclear signalling within a single 30-day window, compressing the escalation ladder in ways that challenge deterrence frameworks built around sub-threshold ambiguity. China's coordinated pressure across at least four geographic theatres — Second Thomas Shoal, Scarborough Shoal, the East China Sea, and Taiwan's eastern EEZ — signals a deliberate, concurrent multi-front strategy that strains the response capacity of any single partner nation.
Coverage
EastChinaSeaGreyZoneGreyZoneActivityGreyZoneAndCCGOperationsLuzonStraitAndBashiChannelSCSSouthernApproachesSouthChinaSeaContestations
RC03 Philippines
14
signals · max mag 5
GreyZoneAndCCGOperations · SouthChinaSeaContestations
RC04 Japan
6
signals · max mag 5
EastChinaSeaGreyZone
RC05 Cross-Strait
8
signals · max mag 4
GreyZoneActivity
RC07 Maritime Corridors
13
signals · max mag 5
LuzonStraitAndBashiChannel · SCSSouthernApproaches
Strategic Synthesis
The defining pattern across July 2026 is China's willingness to cross previously observed thresholds in close succession rather than sequentially. On 20 July, CCG personnel struck a Philippine Navy marine in the head with a wooden baton at Second Thomas Shoal — assessed by USNI News as the worst personal injury in the ongoing Sierra Madre dispute — while simultaneously disrupting a rotation and resupply mission to BRP Sierra Madre. Within 72 hours, CCG vessels conducted two consecutive days of water cannon attacks at Scarborough Shoal, with up to 12 CCG and 3 maritime militia vessels involved and one Philippine vessel temporarily losing satellite internet connectivity, signalling an electronic disruption dimension alongside physical coercion. AMTI analysis covering January–June 2026 recorded 933 CCG ship-days at Scarborough — nearly matching the full-year 2025 total of 1,099 — and 112 documented CCG-PCG encounters in H1 2026 alone, establishing that the July escalation was the sharp edge of a sustained intensity curve, not an isolated spike.
The nuclear and conventional maritime signalling dimension adds a qualitatively distinct layer. On 6 July, a PLAN Type 094 SSBN conducted China's first publicly acknowledged full-range SLBM test into the Pacific Ocean, launching from the South China Sea bastion with impact assessed near 174°E 6°S, demonstrating end-to-end sea-based nuclear second-strike capability. Japan's Coast Guard received only one day's advance notice, framed as a falling space debris hazard rather than a missile test. Thirteen days later, PLAN Type 052D destroyer CNS Kaifeng conducted machine-gun live-fire exercises approximately 112–180 km southwest of Okinotori Island while operating alongside a Russian Navy corvette — the first time Japanese military officials have publicly disclosed live-fire exercises by China inside Japan's claimed EEZ waters. The pairing of an SLBM test with a conventional live-fire drill inside a partner's claimed EEZ, conducted alongside Russian forces, reflects an integrated deterrence-signalling posture that deliberately spans nuclear, conventional, and alliance dimensions simultaneously.
Diplomatically, Beijing's legal and influence architecture is consolidating in parallel with its kinetic actions. On 12 July, the 10th anniversary of the 2016 arbitral ruling, China's MFA issued a formal statement declaring the award 'null, void and without binding force' in direct response to a 14-nation joint statement. According to Global Times — a Chinese state-media outlet — scholars at a Jinan University symposium asserted that the Batanes Islands are a natural geographic extension of Taiwan and thus Chinese sovereign territory, a claim that, if pursued, would have direct implications for Bashi Channel access and Philippine territorial integrity. Meanwhile, CCG patrols east of Taiwan rotated in place on 4 July with the relief vessels subsequently disabling AIS transponders approximately 24 hours after arrival, and Taiwan's OAC Minister warned this incremental presence was gradually rewriting the Taiwan Strait status quo. The 59th ASEAN Foreign Ministers' Meeting, hosted by the Philippines as 2026 ASEAN Chair, failed to produce communiqué text meaningfully stronger than Malaysia's 2025 chair text on the South China Sea, confirming that multilateral diplomatic constraint on Chinese grey-zone behaviour remains structurally limited.
Watch Items
- First confirmed physical boarding or seizure of a Philippine government vessel at either Second Thomas Shoal or Scarborough Shoal — if observed, this would represent a further threshold crossing beyond the baton assault and would likely trigger direct invocation of the US-Philippines Mutual Defense Treaty.
- Whether CCG vessels east of Taiwan — which disabled AIS approximately 24 hours after the 4 July rotation — resume persistent AIS transmission or conduct radio verification challenges against US or Japanese commercial vessels, which would confirm Gregory Poling's assessment that Beijing is operationalising blockade-enforcement mechanisms rather than conducting symbolic patrols.
- A second PLAN SLBM test with shorter or no advance NOTAM notice to Japan, or with a trajectory overflying sovereign Philippine territory rather than northern Luzon airspace, which would indicate deliberate normalisation and reduced deconfliction willingness following the 6 July test.
- Whether the 10th-anniversary MFA statement rejecting the 2016 Arbitral Award is followed by CCG issuance of formal 'law enforcement jurisdiction' notices or boarding protocols citing Chinese domestic law at Scarborough Shoal — if observed, this would signal Beijing is moving from declaratory lawfare toward operational enforcement of its rejected legal position.
Research Centre Contributions
RC03 Philippines
RC03's 14 signals document an escalating physical confrontation cycle — from CCG patrol surges and vessel concentrations through the baton assault at Second Thomas Shoal and two consecutive days of water cannon attacks at Scarborough Shoal — indicating that Manila's policy of transparency and resupply persistence has not deterred China from raising the cost of every mission. The simultaneous mutual ambassador summons on 21 July and China's formal rejection of the 2016 Arbitral Award on its 10th anniversary reflect a bilateral that has moved beyond diplomatic management into open institutional confrontation.
RC04 Japan
RC04's six signals document a sequenced escalation in the East China Sea and Philippine Sea: a first-ever publicly disclosed PLAN SLBM test into the Pacific on 6 July, followed by an armed CCG vessel entry into Senkaku territorial waters approaching a Japanese fishing vessel on 7 July, and then a PLAN live-fire drill inside Japan's claimed EEZ on 19 July conducted alongside Russian forces. Japan's formal diplomatic protest and Defence Minister Koizumi's decision to internationalise the SLBM concern at the NATO Ankara Summit signal Tokyo is treating these incidents as a connected coercive sequence rather than isolated events.
RC05 Cross-Strait
RC05's signals reveal a dual-track grey-zone campaign against Taiwan combining persistent maritime presence and information operations: CCG vessels established what CSIS AMTI Director Gregory Poling assessed as a permanent patrol east of Taiwan — rotating ships in place on 4 July and conducting radio verification procedures for passing commercial vessels — while the Lanhai 201 fisheries research vessel conducted a week-long survey in Taiwan's EEZ. Concurrently, a Taipei City investigation exposed a social-engineering network renting Taiwan-registered LINE accounts to a firm assessed as linked to China's cyber army, and Taiwan's NSC reported over 110 PLAN and CCG vessels tracked along the First Island Chain, a historic high according to NSC Secretary-General Joseph Wu.
RC07 Maritime Corridors
RC07's 13 signals provide the connective maritime tissue linking all theatres: the Luzon Strait served as the transit corridor for USS George Washington CSG entering the South China Sea on 22 July, as the approach route for the PLAN-Russia surface action group that conducted the EEZ live-fire, and as the geographic focus of Beijing's academically asserted sovereignty claims over the Batanes Islands. AMTI's AIS-based documentation of near-continuous maritime militia deployment inside CCG's 30-nautical-mile perimeter at Scarborough Shoal, combined with the 17th Multilateral Maritime Cooperative Activity running 21–25 July with US, Philippine, and Japanese forces, illustrates the corridor's role as both the primary zone of Chinese area-denial effort and the principal venue for allied counter-presence signalling.
2 Jul 2026
RC07
CCG Record Patrol Density at Scarborough Shoal
SCSSouthernApproaches
ObsAMTI analysis of AIS data (Jan-Jun 2026) shows CCG accumulated 933 ship-days at Scarborough in H1 2026 — nearly matching 2025's full-year total of 1099 ship-days — with monthly average rising from 90 to 156 ship-days. Multiple CCG vessels coordinated a ~30 NM perimeter patrol; 6-8 maritime militia vessels maintained near-continuous inner presence. 112 documented CCG-PCG encounters recorded in H1 2026. AMTI notes this is the highest CCG activity since AIS tracking began in 2019.
AssessmentThe structural shift in CCG patrol density at Scarborough — approaching full-year 2025 levels in just six months — indicates a deliberate strategy to consolidate de facto control before any Code of Conduct deadline. The embedded militia detachment inside the perimeter functions as a persistent access-denial layer below kinetic threshold. Trajectory is strongly escalatory with acceleration.
2 Jul 2026
RC07
Maritime Militia Near-Continuous Deployment at Scarborough as Area Denial Instrument
SCSSouthernApproaches
ObsAMTI AIS analysis (Jan-Jun 2026) documented a persistent detachment of 6-8 Chinese maritime militia vessels maintaining near-continuous presence at Scarborough Shoal inside the CCG's ~30 NM outer perimeter. Some CCG ships patrolled along and at times beyond China's nine-dash line to intercept Philippine vessels before they reached the shoal. The AMTI report noted that CCG activity at Scarborough in 2026 is 'beyond any previously observed CCG activity in the South China Sea since AMTI began regular AIS tracking in 2019.' This militia layer is concurrent with the record CCG patrol density reported in the same report (publication date 2 Jul 2026 used as event date proxy).
AssessmentThe layered CCG outer perimeter plus militia inner cordon constitutes a standing access-denial architecture at Scarborough that operates below kinetic threshold year-round. The militia's near-continuous presence (vs episodic deployment) signals a shift from reactive to persistent area control. Correlation with the removal of the floating research structure on 17 Jun suggests Beijing is substituting alternative control instruments to avoid triggering redlines on fixed structures. (Using publication date as proxy)
2 Jul 2026
RC03
CCG Patrol Surge at Scarborough Shoal
SouthChinaSeaContestations
ObsAMTI analysis of AIS data (1 Jan–30 Jun 2026) finds CCG vessels accumulated 933 ship-days around Scarborough Shoal in the first half of 2026 — nearly matching the full-year 2025 total of 1099 ship-days — with monthly averages rising from 90 to 156 ship-days year-on-year. Multiple CCG ships coordinated to maintain a ~30 NM perimeter, while 6–8 maritime militia vessels maintained near-continuous presence closer to the shoal.
AssessmentThe near-doubling of CCG patrol density, sustained by coordinated multi-vessel perimeter tactics, signals a structural shift toward near-permanent area-denial at Scarborough rather than episodic enforcement. This tempo increase provides the operational baseline that made the late-July water cannon incidents possible and represents a decisive ratchet in CCG capacity to interdict Philippine fisheries and coast guard access.
4 Jul 2026
RC05
CCG Rotation and Normalisation East of Taiwan
GreyZoneActivity
ObsOn 4 July CCG ships 2305 and 1401 arrived in the eastern part of Taiwan's claimed EEZ to relieve CCG ships 2304 and 2502 which had maintained a continuous presence since 1 June. Ship-tracking data showed the relief ships turned off their AIS transponders approximately 24 hours after arrival making them harder to track. This marked the first confirmed rotation-in-place suggesting Beijing intends to sustain permanent CCG presence east of Taiwan rather than episodic deployments. Taiwan deployed two CGA vessels to shadow the new formation.
AssessmentRotation-in-place east of Taiwan is a doctrinal threshold event. Unlike prior brief episodic CCG appearances east of the island this relief-in-place mirrors Beijing's South China Sea normalisation playbook and converts Taiwan's Pacific flank from strategic depth into permanently contested space. The AIS deactivation compounds the monitoring challenge for Taiwan the US and Japan. Assessed as the single most structurally significant grey-zone shift of the month.
4 Jul 2026
RC05
Record PLAN/CCG Maritime Mobilisation First Island Chain
GreyZoneActivity
ObsTaiwan's NSC Secretary-General Joseph Wu stated on 4 July that over 110 PLAN and CCG vessels had been tracked along the First Island Chain marking a historic high. NSB Director-General Tsai Ming-yen confirmed on 6 July that the July–September period is China's peak annual exercise season and stated the NSB was monitoring whether new operational patterns had emerged. A China-Russia Maritime Joint Exercise 2026 also commenced in the Yellow Sea concurrently.
AssessmentConcurrent CCG normalisation east of Taiwan combined with a record surface vessel count along the First Island Chain and simultaneous China-Russia naval exercises presents a compounding pressure picture. Even if the vessel surge partly reflects typhoon-avoidance port-clearance the overall posture coincides with new CCG patrol architecture east of the island and signals a deliberate escalation of tempo into peak exercise season.
6 Jul 2026
RC04
PLAN SLBM Test — Pacific First-Ever Launch
EastChinaSeaGreyZone
ObsPLAN launched a JL-2 or JL-3 SLBM from a nuclear-powered submarine in the South China Sea at approx 04:01 UTC on 6 July 2026 — the first-ever Chinese SLBM test into international open waters. The missile flew over northern Luzon and landed between Nauru and Tonga. Japan's Coast Guard was notified one day in advance only that a hazard zone existed south of Cape Shionomisaki for 'falling space debris'; China's MND clarified it was a ballistic missile test only approximately 90 minutes before launch. Japan formally raised concerns. Tokyo's Chief Cabinet Secretary Kihara characterised China's military activities as a 'grave concern' for Japan and international society.
AssessmentThis is the most consequential strategic signal in the time window. The combination of insufficient notice (debris cover story), the hazard zone overlapping Japan's EEZ, and the coincidence with Joint Sea-2026 exercise start indicates deliberate strategic signalling directed at Japan and the US. Japan's measured protest — stopping well short of sanctions or alliance invocation — reveals a high but not yet crossed escalation threshold. The public use of 'grave concern' language alongside NATO engagement signals Japan is internationalising its response posture.
6 Jul 2026
RC04
JASDF Scramble — Chinese Aircraft East China Sea (SLBM Day)
EastChinaSeaGreyZone
ObsIn the afternoon of 6 July 2026, JASDF detected and scrambled fighter jets to monitor Chinese aircraft activity over the East China Sea. Japan's Joint Staff Office issued an event summary on 8 July 2026 confirming the scramble. No further details on aircraft type or airspace breach were disclosed. The scramble coincided with the PLAN SLBM test conducted the same day and the commencement of Joint Sea-2026.
AssessmentChinese aerial activity over the East China Sea on the same day as the SLBM test and the start of Joint Sea-2026 suggests a coordinated multi-domain pressure package. Japan's routine scramble response indicates the ADIZ monitoring posture remains calibrated and controlled, consistent with an intent to avoid escalation while maintaining presence.
6 Jul 2026
RC07
PLAN SSBN Pacific SLBM Test — South China Sea Bastion Launch
LuzonStraitAndBashiChannel
ObsPLAN Type 094 SSBN conducted China's first publicly acknowledged full-range SLBM test into the Pacific Ocean on 6 July 2026, launching from the South China Sea bastion. Two NOTAMs were issued covering both a South China Sea and Bohai Sea launch corridor; the missile was fired from the South China Sea track with impact near 174°E 6°S. The test demonstrated end-to-end sea-based nuclear second-strike capability and validates a South China Sea bastion posture that relies on Bashi Channel access restriction to protect SSBN patrol areas from Allied ASW forces.
AssessmentThis is the most strategically significant PLAN nuclear signalling event of the year. A South China Sea bastion posture makes PLAN SSBN survivability directly contingent on denying or monitoring traffic through the Bashi Channel. The test signals that PLAN is operationalising continuous at-sea deterrence and that the Bashi Channel is now an implicit nuclear chokepoint — increasing the stakes of any allied interdiction doctrine in the strait. Assessed HIGH confidence given official PLAN statement and corroborating NOTAM analysis.
7 Jul 2026
RC04
CCG Armed Vessel Entry — Territorial Waters Senkaku / Approach to Zuihou Maru
EastChinaSeaGreyZone
ObsTwo CCG vessels equipped with shipborne guns entered Japanese territorial waters around the Senkaku/Diaoyu Islands on 7 July 2026 and approached the Japanese fishing boat Zuihou Maru with two crew members on board — a qualitative escalation beyond standard patrol entry. Japan's 11th Regional Coast Guard HQ (Naha) confirmed both vessels were gun-armed and that two additional armed CCG vessels were present in the contiguous zone. Global Times separately reported Chinese government vessels had been present in the contiguous zone for 235 consecutive days as of that date. Japan issued departure orders; China's CCG claimed it was expelling a Japanese fishing vessel that had intruded into Chinese waters.
AssessmentThe direct approach to a Japanese fishing vessel by armed CCG ships — explicitly rare per Japan Times and Reuters — marks a material qualitative escalation above the baseline patrol tempo. The selection of 7 July (89th anniversary of the Marco Polo Bridge Incident / Lugou Bridge Incident) carries unmistakable political symbolism. This event structurally alters the CCG engagement pattern from presence-assertion to direct civilian vessel interdiction, raising the risk of a kinetic incident and testing Japan's escalation threshold in the fishing-vessel protection domain.
7 Jul 2026
RC07
PLA Aircraft and PLAN Ship Sustained Operations Around Taiwan — Southwestern ADIZ Entries
LuzonStraitAndBashiChannel
ObsTaiwan MND reported 4 PLA aircraft sorties and 9 PLAN ships operating around Taiwan on 7 July 2026 as of 0600 UTC+8; 3 of 4 sorties crossed the Taiwan Strait median line and entered Taiwan's southwestern ADIZ. The southwestern ADIZ corridor directly overlies the northern Luzon Strait approach and Bashi Channel airspace, putting these incursions within monitoring range of the strait's eastern access. ROC Armed Forces deployed CAP aircraft, Navy vessels, and coastal missile systems in response.
AssessmentRoutine daily activity by PLAN/PLAAF at mid-July tempo is consistent with the pre-2024 baseline pattern documented by ISW-CDOT. However, 9 PLAN ships operating concurrently represents elevated naval density and is analytically linked to the ongoing SSBN test posture and post-Joint-Sea-2026 patrol activity. Southwestern ADIZ incursions reinforce PLAN presence at the northern mouth of the Luzon Strait. Assessed MEDIUM confidence; date is official ROC MND release.
7 Jul 2026
RC05
PRC Cyberespionage Social-Engineering Network Charged in Taiwan
GreyZoneActivity
ObsTaipei City Investigation Office issued deferred prosecution orders on 7 July against two executives of local firm Abigail — Li Hualun and Chen Mengsen — for renting Taiwan mobile-registered LINE accounts to Xiamen Empress Information Technology Co. Ltd. allegedly linked to China's cyber army. The accounts enabled Chinese operators to impersonate journalists and conduct social-engineering attacks against Taiwanese officials scholars and NGO workers. The ICIJ and Citizen Lab's Citizen Lab had previously documented the campaign as GLITTER CARP/SEQUIN CARP operations. Malware disguised as encrypted communications software was also deployed.
AssessmentThis case reveals a maturing hybrid model: PRC cyber operators sub-contracting to Taiwan-resident facilitators to launder attribution. Targeting politicians academics and NGO workers serves dual objectives — intelligence collection and suppression of pro-Taiwan civil society voices. The timing ahead of November 2026 local elections amplifies the influence-operation risk. Confidence is high given corroborating ICIJ and Citizen Lab technical attribution.
8 Jul 2026
RC04
Koizumi Ankara Statement — Japan Formally Internationalises SLBM Concern at NATO
EastChinaSeaGreyZone
ObsJapan Defence Minister Shinjiro Koizumi held an extraordinary press conference in Ankara on 8 July 2026 on the sidelines of the NATO Ankara Summit and IP4 ministerial meeting. Koizumi stated that China's launch of a ballistic missile the previous day was a 'serious concern for Japan and the international community' and confirmed Japan exchanged views with US Defense Secretary Hegseth and followed up on 'Operation Supercharge'. Japan also confirmed Japan-US commitment to strengthening deterrence in light of the missile launch. Japan publicly linked China's SLBM test to the broader regional security picture at a multilateral forum for the first time.
AssessmentInternationalising the SLBM protest at NATO — coordinated with the IP4 grouping (Japan, Australia, New Zealand, South Korea) — signals Japan is deliberately expanding the diplomatic costs framework for Chinese strategic coercion beyond bilateral channels. The invocation of NATO-IP4 linkage alongside a direct US-Japan deterrence reaffirmation suggests Tokyo is calibrating its response to impose multilateral signalling costs without taking unilateral escalatory action. This is consistent with Japan maintaining a high but not breached threshold.
8 Jul 2026
RC05
OAC Minister Warns CCG Patrols Rewriting Taiwan Strait Status Quo
GreyZoneActivity
ObsAt the 2026 Taiwan International Ocean Forum on 8 July Ocean Affairs Council Minister Kuan Bi-ling warned that China's incremental grey-zone pressure was gradually rewriting the Taiwan Strait status quo without triggering open war. Attended by US Senator Tammy Duckworth and delegates from 15 countries Kuan framed the CCG eastern-Taiwan patrols as part of a single integrated pattern of authoritarian expansionism across Taiwan Japan and the Philippines. NSB Director Tsai Ming-yen said four Chinese naval formations including warships were operating in the Western Pacific the same day noting an upward trend in mobilisation during peak exercise season.
AssessmentKuan's public framing at a multilateral forum is significant as an official Taiwanese effort to internationalise the grey-zone issue and build partner-nation consensus ahead of a potential status-quo shift. The concurrent NSB disclosure of four active formations underscores Taipei's deliberate choice to publicise pressure rather than absorb it quietly. This represents a signalling response to the early-July CCG rotation-in-place event.
8 Jul 2026
RC05
CCG Sustained Patrols East of Taiwan Signal New Permanent Presence
GreyZoneActivity
ObsBy 8 July China signalled its intent to maintain the new CCG patrol east of Taiwan as a permanent feature. CCG spokesman Jiang Lue confirmed the second group of vessels would continue law enforcement patrols after the first group's relief on 4 July. CSIS AMTI Director Gregory Poling stated that by conducting radio verification procedures for passing commercial vessels China was effectively rehearsing the mechanisms required for a future blockade or quarantine. Taiwan's CGA deployed escort vessels to shadow the two Chinese ships. Chinese state media linked the patrols to Japan–Philippines EEZ delimitation talks framing them as a lawfare assertion of Chinese coastal-state rights east of Taiwan.
AssessmentThe combination of CCG spokesman public confirmation of continued patrols AMTI director's blockade-rehearsal assessment and Taiwan's shadowing response confirms this as a durable posture change not a temporary coercive episode. Beijing's lawfare framing — asserting Chinese coastal-state rights in waters it does not legally possess — mirrors the Scarborough Shoal and South China Sea salami-slicing pattern. Impact rated High given the first-time normalisation of CCG presence on Taiwan's Pacific flank.
9 Jul 2026
RC07
Chinese Academic Sovereignty Claim Over Batanes Islands — Lawfare Against Bashi Channel Denial Posture
LuzonStraitAndBashiChannel
ObsOn 9 July 2026 China's Global Times reported on a Jinan University symposium held 30 June at which scholars from Nanjing University and the Chinese Academy of Social Sciences unanimously concluded that the Batanes Islands are a natural geographic extension of Taiwan and thus Chinese sovereign territory. Scholars also asserted the Japan-Philippines maritime delimitation talks violate international law and called for China to take 'corresponding actions.' The Philippines DFA rejected the claim as settled and not up for debate; Defense Secretary Teodoro called it 'baseless and ludicrous' and a signal of Beijing's intent to dominate the Pacific. Stanford's SeaLight project linked the claim to recent PLAN patrols through the Bashi Channel. Beijing's Foreign Ministry declined to endorse or repudiate the claim.
AssessmentThis represents a coordinated lawfare signal rather than a formal territorial claim. The targeting of Batanes — which hosts the Mahatao FOB and is the intended basing site for NMESIS and allied ISR systems — directly challenges the US-Philippine Bashi Channel denial architecture. The pattern mirrors the Ryukyu 'status undetermined' tactic: academic ambiguity allows Beijing to pressure Manila without formal escalation. Timing concurrent with SSBN bastion test and Joint Sea-2026 patrol is analytically significant. Assessed HIGH confidence on the fact of the symposium and Manila's response.
12 Jul 2026
RC03
China Formal Rejection of 2016 Arbitral Award on 10th Anniversary
SouthChinaSeaContestations
ObsOn 12 July 2026, the 10th anniversary of the 2016 arbitral ruling, China's MFA issued a formal statement declaring the award 'null, void and without binding force,' asserting internal waters and historic rights over all South China Sea Islands including Nansha Qundao, and rejecting compulsory UNCLOS dispute settlement under its 2006 Article 298 declaration. The statement was a direct response to a 14-nation joint statement (US, Philippines, Australia, Canada, Germany, Japan, UK et al.) reaffirming the award's binding legal force.
AssessmentChina's re-articulation of internal waters and historic rights claims on the award's 10th anniversary, in response to a 14-nation coalition statement, signals Beijing's intent to harden its legal counter-narrative as a prerequisite to sustained operational coercion. The explicit invocation of internal-waters status for the Nansha Islands strengthens the legal architecture used to justify CCG interdictions.
13 Jul 2026
RC03
Chinese Vessel Concentration in Philippine EEZ
SouthChinaSeaContestations
ObsAFP monitoring for the week of 7–13 July 2026 recorded 24 Chinese vessels in key WPS areas: 21 CCG and 3 PLAN vessels. Bajo de Masinloc (Scarborough) held the highest concentration with 13 CCG ships; Ayungin (Second Thomas) Shoal had 4; Escoda Shoal 3; and the Pag-asa Islands area 4. The simultaneous PLAN and CCG presence reflects coordinated grey-zone layering across multiple features.
AssessmentConcurrent CCG and PLAN deployment across four separate Philippine-claimed features in a single reporting week demonstrates China's capacity for simultaneous multi-domain pressure. The inclusion of three PLAN warships alongside CCG units elevates the coercive backdrop and narrows Philippine manoeuvre space should any single incident escalate.
14 Jul 2026
RC03
Philippines DOJ Dedicated Maritime Law Unit Established
SouthChinaSeaContestations
ObsThe Philippine Department of Justice announced the creation of a dedicated maritime law unit to serve as a single institutional repository for legal expertise on the 2016 Arbitral Award and UNCLOS, announced by Justice Secretary Fredderick Vida on or around 14 July 2026. The AFP issued a formal statement of support, framing the unit as 'critical legal armor' complementing the physical maritime presence of the PCG and BFAR. The unit's mandate explicitly encompasses sustaining the Philippines' arbitral gains. (using publication date as proxy)
AssessmentThe DOJ unit institutionalises the Philippines' legal-track strategy, creating a whole-of-government architecture to counter Chinese diplomatic and legal revisionism. Paired with the ASEAN Maritime Centre and ASEAN Coast Guard Forum framework finalised in 2026, it signals Manila is building durable institutional structures — not just reactive diplomatic responses — around the arbitral award.
17 Jul 2026
RC05
Lanhai 201 Fisheries Research Vessel Surveys Taiwan Eastern EEZ
GreyZoneActivity
ObsFrom 17–23 July Chinese fisheries research vessel Lanhai 201 operated by the East China Sea Fisheries Research Institute under the Chinese Academy of Fishery Sciences conducted a weeklong survey in Taiwan's EEZ. The vessel was tracked 53 nautical miles east-northeast of Orchid Island (Lanyu) off Taitung County and operated in the EEZs of Taiwan Japan and the Philippines. China's Ministry of Agriculture and Rural Affairs publicly announced the survey as legitimate fisheries management. Taiwan's CGA condemned it as violating sovereignty stating the survey required coastal state consent under UNCLOS. This was the second such research vessel incursion since June. A CCG escort vessel (2305) was observed with the Lanhai 201. CMSI Note 22 assessed the mission as supporting Beijing's broader effort to assert sovereignty ambiguity over the Ryukyu Islands and Batanes.
AssessmentThe deployment of a state-owned fisheries research vessel into Taiwan's EEZ — escorted by CCG and trumpeted in state media — is a deliberate civilian-instrument sovereignty assertion. The CCG escort converts a nominally scientific mission into a law-enforcement-backed incursion. Operating across three EEZs in one cruise integrates the Taiwan the Japan and the Philippines pressure theatres into a single operation consistent with Kuan Bi-ling's first-island-chain framing. Rated High as the second such intrusion in six weeks marks a new operational tempo.
18 Jul 2026
RC07
NAVAREA XI Warning 26-0324 — Hazardous Operations Zone North of Luzon in Luzon Strait Approach
LuzonStraitAndBashiChannel
ObsNAVAREA XI Warning 26-0324 was issued 18 July 2026 (0000Z) designating two hazardous operations / space debris re-entry areas in the North Pacific north of Luzon in the Luzon Strait approach corridor. Zone A was bounded by 21°50'N 123°54'E / 21°51'N 124°17'E / 20°30'N 124°21'E / 20°29'N 123°58'E; Zone B by 21°16'N 123°55'E / 21°17'N 124°19'E / 19°56'N 124°22'E / 19°55'N 123°59'E. Active window: 0100Z–0700Z 22 July 2026. Message self-cancelled 0800Z 22 July.
AssessmentAlthough issued as a space debris notice, the timing and geographic footprint — spanning both flanks of the northern Luzon Strait at 20°N–21°51'N — overlapped with the USS George Washington CSG's transit of the strait on the same date (22 July). The six-hour restriction created a transient navigational awareness requirement across the primary shipping channel north of Luzon. No military exercise or firing attribution is made in the notice itself; confidence in any operational linkage is Low.
18 Jul 2026
RC03
DND Pledges Sustained Military Asset Deployment in WPS
SouthChinaSeaContestations
ObsThe Philippine Department of National Defense stated on 18 July 2026 that it would sustain continuous deployment of military assets in the West Philippine Sea to protect maritime territory and expose illegal activities by foreign vessels. The commitment came one week after the 10th anniversary of the 2016 Arbitral Award and coincided with denunciation by the National Maritime Council of a China Daily racist propaganda video targeting Filipinos.
AssessmentThe DND statement operationalises the political signalling around the arbitral anniversary, converting declaratory posture into force-deployment commitment. The simultaneous condemnation of Chinese propaganda indicates Manila is managing escalation in both the kinetic and information domains, seeking to maintain domestic and international legitimacy while sustaining its presence.
19 Jul 2026
RC04
PLAN Live-Fire Drill Inside Japan Claimed EEZ — First Publicly Disclosed
EastChinaSeaGreyZone
ObsOn 19 July 2026, PLAN Type 052D destroyer CNS Kaifeng (124) conducted machine-gun live-fire gunnery exercises at a sea target approximately 112–180 km southwest of Okinotori Island while operating alongside Russian Navy corvette RFS Rezkiy as part of the post-Joint Sea-2026 joint patrol. This was the first time Japanese military officials have publicly disclosed live-fire exercises by China inside its claimed EEZ waters. Kaifeng broadcast advance radio warnings before firing. Japan's Defence Ministry publicly confirmed and photographed the exercise. Japan does not recognise China's EEZ claim around Okinotori; China does not recognise Japan's EEZ around Okinotori, which it terms a rock under UNCLOS.
AssessmentThe live-fire inside Japan's claimed EEZ normalises PLAN combat exercises in the western Pacific approaches to Japan's southern island chain and structurally expands China's operational comfort zone. Framing it as part of the joint patrol — with a Russian frigate alongside — amplifies the Sino-Russian combined-arms signalling and ensures Japan cannot protest without appearing to legitimise the Okinotori EEZ dispute. The first-time public disclosure by Japan suggests tactical monitoring has matured and Tokyo's escalation management now includes international transparency as a counter-coercion tool.
19 Jul 2026
RC07
PLAN Destroyer CNS Kaifeng Live-Fire Drill in Japan EEZ — Philippine Sea Approach to Luzon Strait
LuzonStraitAndBashiChannel
ObsOn 19 July 2026 PLAN Type 052D destroyer CNS Kaifeng (124) conducted a small-calibre machine-gun live-fire exercise against a sea target 112 miles (180 km) from Japan's Okinotori Island within Japan's claimed EEZ in the Philippine Sea. Kaifeng was operating as part of a PLAN-Russia joint surface action group that also included Type 055 cruiser CNS Anshan (103) and replenishment ship CNS Kekexilihu (903), shadowed by Russian corvette RFS Rezkiy (343). Japan's Joint Staff Office detected the firing and JMSDF P-1 and P-3C MPA were deployed in response. Japan Defense Minister Koizumi protested publicly. China's MFA defended the action as consistent with international law, invoking freedom of navigation principles it typically contests in the South China Sea.
AssessmentThis is the first publicly announced case of a foreign warship conducting a live-fire exercise inside Japan's EEZ in the Philippine Sea, establishing a new precedent. The joint PLAN-Russian surface action group's southward track through the Philippine Sea places it on the northern approach corridor to the Luzon Strait. The Okinotori live-fire can be read as a demonstration of PLAN freedom-of-action across the Philippine Sea — the maritime space through which any US CSG must transit to reach the Luzon Strait from the east. Assessed HIGH confidence; primary source Japan Joint Staff Office.
20 Jul 2026
RC07
CCG-PN Physical Confrontation at Second Thomas Shoal — Sailor Injured
SCSSouthernApproaches
ObsOn 20 Jul 2026 at ~0915 local time CCG vessel 21560 — which had been stationed inside the shoal for nearly a week — launched an inflatable boat that approached within 20-30 m of BRP Sierra Madre. Philippine Navy deployed two RHIBs in response. Video shows CCG boat ramming a Philippine RHIB; personnel exchanged blows with wooden batons and oars. Two PN personnel were injured; one sustained a serious head injury and was medically evacuated by PCG on 21 Jul. Philippine DND stated Manila was preparing 'measures to meet this aggression.' US Secretary of State Rubio condemned China's 'dangerous and aggressive actions.' Beijing accused Philippines of transgressing the 2024 provisional understanding.
AssessmentMost severe physical confrontation at Second Thomas Shoal since June 2024. The CCG boat's <30 m approach to BRP Sierra Madre itself — as distinct from intercepting a resupply vessel — marks a deliberate escalation in the access-denial envelope. The provisional arrangement, which had suppressed major incidents for ~13 months, is now functionally under strain. US carrier strike group deployment days later confirms Washington read this as a threshold event.
20 Jul 2026
RC07
BRP Sierra Madre Resupply Mission Conducted Under CCG Confrontation Conditions — July 2026
SCSSouthernApproaches
ObsThe 20 Jul 2026 confrontation unfolded during a rotation and resupply (RORE) mission to BRP Sierra Madre when CCG vessel 21560 launched a small boat that approached within 20-30 m of the grounded ship. Philippine Navy personnel deployed RHIBs to intercept. The RORE mission was disrupted by the confrontation; two PN personnel were injured and medically evacuated. The provisional understanding reached in July 2024 — under which 13 missions had been conducted without dangerous encounters — was invoked by both sides in mutual blame, with Beijing accusing Manila of violating its terms. Mission completion status was not confirmed by AFP.
AssessmentThis signal records the RORE mission as a corridor-control indicator. The failure to secure safe passage for the Jul 2026 resupply — and the injury of personnel during what was described as a 'routine patrol' associated with the mission — indicates that the 2024 provisional arrangement no longer provides functional de-escalation assurance. The access corridor to BRP Sierra Madre is now effectively contested at physical proximity level, representing a qualitative deterioration in corridor control.
20 Jul 2026
RC03
CCG Baton Assault on Philippine Navy Marine at Second Thomas Shoal
GreyZoneAndCCGOperations · SouthChinaSeaContestations
ObsOn 20 July 2026 at approximately 09:15 local time, CCG cutter 21560 deployed a RHIB carrying eight personnel that unlawfully approached BRP Sierra Madre. Philippine Navy dispatched two RHIBs in response. CCG personnel struck a Philippine Navy marine in the head with a wooden baton, causing a serious head injury — assessed by USNI News as the worst personal injury in the ongoing Sierra Madre dispute. A Philippine rubber boat was also damaged. Video released by both sides showed boat collisions and physical exchanges using oars and batons. A US Coast Guard vessel present facilitated medical evacuation. The US State Department condemned China's 'dangerous and aggressive actions' in a same-day statement.
AssessmentThis is the most serious use of direct physical force by CCG personnel against Philippine military members since the June 2024 melee-weapons incident. The deployment of a CCG RHIB to approach Sierra Madre — rather than interdicting a resupply vessel — marks a tactical shift toward confronting the garrison directly. The timing on the opening day of the ASEAN AMM was almost certainly deliberate, demonstrating Beijing's willingness to use coercive incidents as diplomatic signals.
20 Jul 2026
RC03
US State Department Condemnation and Alliance Reaffirmation — Second Thomas Shoal Incident
SouthChinaSeaContestations
ObsThe US State Department issued a same-day public statement on 20 July 2026 condemning China's 'dangerous and aggressive actions' against Philippine navy personnel at Second Thomas Shoal, calling on China to immediately cease its destabilising conduct and reaffirming the July 2016 Arbitral Tribunal ruling. Secretary of State Marco Rubio, attending the ASEAN AMM in Manila on 23 July, publicly disclosed that a US Coast Guard vessel had been present during the incident and had intervened to facilitate medical evacuation of the injured Philippine sailor.
AssessmentThe speed and seniority of the US diplomatic response — escalating from State Department spokesperson statement to Secretary of State public statement within 72 hours — signals US willingness to treat the Second Thomas Shoal garrison as a near-treaty-obligation trigger. The disclosure of a USCG intervention is operationally significant: it places a US asset as a direct interlocutor in a PRC-Philippine kinetic exchange for the first time on record.
20 Jul 2026
RC05
Taiwan Conducts Interdepartmental Blockade-Resilience Supply Chain Drills
GreyZoneActivity
ObsTaiwan's Ministry of the Interior led first-ever interdepartmental drills in July to practice securing foreign and domestic supply chains and escorting commercial ships through a PRC maritime blockade. Taiwan Coast Guard announced joint plans with the navy to protect Pacific supply routes in a blockade or quasi-war scenario. President Lai had directed the NSC MND CGA and other agencies after June 23 tabletop exercises simulating a PRC maritime quarantine to strengthen maritime and air intelligence expand drone reconnaissance and update energy and critical supplies stockpile plans. Taiwan News reported CGA preparations including tabletop and live operational drills for blockade contingencies.
AssessmentThese are the first-ever whole-of-government interdepartmental blockade-resilience drills announced by Taiwan's Ministry of the Interior — a structural first occurrence that alters trend direction. The direct linkage to CCG eastern-Taiwan operations confirms that Taipei is now treating grey-zone maritime pressure as a credible near-term contingency rather than a distant planning scenario. Rated Medium impact as a defensive/responsive measure with High deterrence signalling value.
21 Jul 2026
RC04
Japan Diplomatic Protest and Koizumi Farnborough Signal — EEZ Live-Fire
EastChinaSeaGreyZone
ObsOn 21 July 2026, Chief Cabinet Secretary Minoru Kihara confirmed Japan had lodged a formal diplomatic protest with China via diplomatic channels over the 19 July live-fire drill, citing danger to navigation of nearby vessels. Defence Minister Koizumi had already disclosed the incident at Farnborough on 20 July and characterised it alongside the joint China-Russia bomber flight and SLBM test as manifestations of 'deepening military cooperation between China and Russia.' China's Foreign Ministry spokesperson Lin Jian called Japan's concerns 'completely unreasonable' and reaffirmed Beijing's position that Okinotori is a rock not entitled to an EEZ.
AssessmentJapan's sequenced disclosure strategy — Koizumi at Farnborough before the formal CCS protest — indicates a deliberate use of international forums to amplify the signal beyond bilateral channels. The muted response (diplomatic protest only; no JSDF operational counter-action) again confirms Japan's calibrated posture: maximum diplomatic signal cost with minimum operational escalation risk. The absence of a stronger response — such as JSDF shadowing in the area — suggests Japan's threshold for kinetic or operational counter-response in the Pacific EEZ domain remains high.
21 Jul 2026
RC07
17th US-Philippines-Japan Multilateral Maritime Cooperative Activity
SCSSouthernApproaches
ObsThe 17th Multilateral Maritime Cooperative Activity (MCA) ran 21-25 Jul 2026 in the Philippines' EEZ. AFP confirmed participation of warships, coast guard vessels, surveillance and fighter aircraft from the US and Japan. LCS USS Santa Barbara (LCS-32) participated alongside PCG patrol vessel BRP Malabrigo, JMSDF destroyer JS Yudachi (DD-103) and Philippine frigate BRP Antonio Luna (FFG-15). Drills included communications, replenishment at sea, and division tactics. Exercise launched one day after the 20 Jul baton incident at Second Thomas Shoal. AFP described the activity as highlighting 'the enduring partnership among the partner nations in promoting peace, stability, and security.'
AssessmentTriggering the MCA one day after the Second Thomas Shoal baton incident compresses the standard diplomatic-to-military response timeline and explicitly signals alliance cohesion under provocation. Japan's participation alongside the US adds a third-party deterrence signal that Beijing cannot characterize as a bilateral Philippines-US provocation. The exercise's timing and force mix constitute a deliberate FONOP-adjacent deterrence package.
21 Jul 2026
RC03
Mutual Ambassador Summons – Bilateral Diplomatic Crisis
GreyZoneAndCCGOperations
ObsThe day after the baton assault at Second Thomas Shoal both countries took the highly unusual step of summoning each other's ambassadors simultaneously. President Marcos summoned Chinese Ambassador Jing Quan to Malacañang Palace at 1700 local time; China's MFA urgently summoned Manila's envoy in Beijing to 'lodge solemn representations' over what it called a Philippine 'deliberate provocation and attack at Ren'ai Reef.' The Philippine presidential spokesperson described the matter as one of 'national security.' China's MFA characterised Philippine actions as 'egregious in nature.'
AssessmentMutual simultaneous ambassador summons represents the most severe diplomatic escalation step since the 2023 laser incident. The reciprocity of the summons signals both sides' determination to hold firm rather than de-escalate. Beijing's framing of the Philippine Navy as provocation instigators and 'attackers' is consistent with a counter-narrative strategy aimed at denying international legitimacy to Manila's transparency operations. Marcos's presidential-level summoning elevates this beyond routine DFA protest to a head-of-state signal of resolve.
21 Jul 2026
RC03
US–Philippines–Japan 17th Multilateral Maritime Cooperative Activity
GreyZoneAndCCGOperations
ObsThe 17th Multilateral Maritime Cooperative Activity (MMCA) ran from 21 to 25 July 2026 in the South China Sea within the Philippine EEZ. Participating forces included naval vessels coast guard cutters surveillance aircraft and fighter aircraft from the Philippines United States and Japan. Activities included communications exercises replenishment at sea operations division tactics cross-deck landings and fly-by operations. The AFP described the drills as reflecting commitment to 'freedom of navigation and overflight while deterring illegal coercive aggressive and deceptive activities.' The exercise began the day after the CCG baton assault at Second Thomas Shoal.
AssessmentThe immediate sequencing of the MMCA one day after the baton incident transforms a routinely scheduled activity into a visible deterrence signal. Trilateral composition (US–Philippines–Japan) is the primary Indo-Pacific alignment architecture and its operational presence in the Philippine EEZ during live CCG coercion incidents signals allied capacity and will. China's simultaneous live-fire exercises in the western Taiwan Strait and South China Sea on 23–24 July indicate Beijing is counter-signalling rather than deterred. The exercise confirms Philippine non-compliance posture is institutionally backed by treaty allies.
21 Jul 2026
RC03
59th ASEAN AMM — ASEAN Fails to Forge Stronger SCS Communiqué Text
SouthChinaSeaContestations
ObsThe 59th ASEAN Foreign Ministers' Meeting (AMM), hosted by the Philippines as 2026 ASEAN Chair from 18–24 July in Manila, failed to produce a communiqué text meaningfully stronger than Malaysia's 2025 chair text on the South China Sea despite the Philippines holding the pen and the week coinciding with the 10th anniversary of the 2016 Arbitral Award. The SCS text was described as 'functionally identical' to the prior year's version, with Code of Conduct aspirational language softened. ASEAN-China talks at the margins agreed to target COC finalisation at the November 2026 summit.
AssessmentASEAN's structural consensus constraint — requiring consensus among members including China-aligned Cambodia and Laos — continues to neutralise Manila's institutional advantage as chair. The diluted SCS communiqué will be read by Beijing as confirmation that multilateral legal pressure through ASEAN remains limited, reducing the diplomatic cost of continued CCG operations in the Philippine EEZ. The COC November deadline is analytically significant as a potential de-escalation window or a moment of renewed friction if talks collapse.
21 Jul 2026
RC05
PRC United Front Influence Operation Targeting Taiwan Political Divisions
GreyZoneActivity
ObsAt the Chinese Freedom and US–Taiwan Security Forum on 21 July in Washington DC Taiwan Presidential Whole-of-Society Defense Resilience Committee member Yu-Hsi Liu presented evidence that the CCP had added digital campaigns to influence networks cultivated through religious exchanges and subsidised China trips to weaponise Taiwan's political divisions. The operation aimed to erode Taiwanese trust in the United States rather than build trust in China. A separate AEI/ISW update from 17 July reported that PRC officials through TAO Director Song Tao had allegedly given KMT members detailed instructions at a May cross-strait event to derail Taiwan's drone procurement special budget.
AssessmentTwo concurrent PRC influence vectors — social-digital campaigns targeting trust erosion and United Front political-party penetration to impede Taiwan's defence procurement — constitute an integrated cognitive-warfare effort ahead of November 2026 local elections. The drone-budget interference allegation is particularly significant as it targets Taiwan's asymmetric deterrence modernisation at its political source. Confidence Medium given reliance on unnamed source for the KMT-TAO allegation.
22 Jul 2026
RC07
USS George Washington CSG Westbound Transit of Luzon Strait — Philippine Sea to South China Sea
LuzonStraitAndBashiChannel · SCSSouthernApproaches
ObsUSS George Washington (CVN-73) and Carrier Strike Group 5 transited the Luzon Strait westbound on 22 July 2026 entering the South China Sea from the Philippine Sea. The CSG comprised CVN-73 with embarked CVW-5 (including F-35C and EA-18G Growler squadrons), cruiser USS Robert Smalls (CG-62) and destroyers USS Benfold (DDG-65) and USS Shoup (DDG-86). The transit was publicly announced by US 7th Fleet under the hashtag #PeaceThroughStrength. US Ambassador to the Philippines Lee Lipton acknowledged the arrival and cited freedom of navigation and overflight. The CSG's repositioning directly followed the most severe Philippine-China physical clash at Second Thomas Shoal to date, in which a Filipino Navy SEAL required medical evacuation.
AssessmentA CSG transit of the Luzon Strait into the South China Sea is a major access-assertion event and a direct demonstration that the US considers the strait open to free transit. The selection of the Luzon Strait route — rather than any alternative — is deliberate given concurrent PLA pressure on the strait corridor. The EA-18G Growler and F-35C flight operations during transit signal electronic warfare and fifth-generation air capability insertion into the South China Sea via this chokepoint. The political timing — 48 hours after the Taiwan Strait live-fire and concurrent with the PHL-US-Japan MCA — reinforces the signal's strategic weight. Assessed HIGH confidence; primary source DVIDS/US Navy official imagery.
22 Jul 2026
RC03
Philippines–China FM Mutual Protest Exchange at ASEAN-AMM Margins
GreyZoneAndCCGOperations
ObsOn the sidelines of the 59th ASEAN Foreign Ministers' Meeting in Manila Philippine Foreign Secretary Lazaro held a bilateral with Chinese FM Wang Yi. Lazaro reiterated a 'strong' protest over CCG 'unacceptable actions against Filipino personnel' and also protested the China Daily racist AI-generated video. Wang Yi lodged a counter-protest over what he called 'the Philippine personnel's egregious act of ramming Chinese law-enforcement vessels' and accused 'certain forces within the Philippine military and police' of deliberately staging provocations under orders from 'external forces.' Both sides agreed to keep communication lines open.
AssessmentThe FM exchange occurring simultaneously with active maritime clashes represents an acute diplomatic-operational disconnect: Chinese grey zone operations intensified even as its top diplomat was physically present in Manila. Wang Yi's accusation of 'external forces' directing Philippine military units is a signal that Beijing intends to widen the narrative conflict to target the US–Philippines alliance, not merely bilateral maritime disputes. Lazaro's decision to also raise the propaganda video contextualises the incidents as part of a multi-domain coercion campaign.
23 Jul 2026
RC07
CCG Vessel Departure from Second Thomas Shoal to Mischief Reef Post-Incident
SCSSouthernApproaches
ObsOn 23 Jul 2026 SeaLight reported via Starboard Maritime Intelligence ship-tracking data that CCG vessel 21560 departed Second Thomas Shoal at ~0800 local and headed toward China's military outpost at Mischief Reef. The vessel was the same CCG ship involved in the 20 Jul confrontation that had maintained a position inside the shoal for nearly a week prior to the incident. The departure followed intense international diplomatic pressure and the Philippine medical evacuation of the injured sailor on 21 Jul.
AssessmentThe withdrawal of CCG 21560 may represent a calibrated tactical pullback to reduce escalation optics while the George Washington CSG transited the Luzon Strait. It does not indicate a change in China's overall posture: the vessel's destination (Mischief Reef) maintains PLAN presence in the broader Spratly operational area. Interpret as a tactical pause rather than a strategic de-escalation.
23 Jul 2026
RC03
CCG Water Cannon and Dangerous Manoeuvre on BFAR Vessels – Scarborough Shoal Day 1
GreyZoneAndCCGOperations
ObsPCG reported that on 23 July CCG vessels fired water cannons and executed 'dangerous manoeuvres' against BFAR government fisheries ships during a mission to deliver supplies to Filipino fishermen at Scarborough Shoal. The PCG stated no injuries or damage were recorded and Philippine vessels continued their mission. The incident occurred hours before top diplomats of both China and the United States arrived in Manila for the ASEAN-AMM. China's CCG said it drove away two Philippine vessels 'intruding into' waters around Huangyan Island.
AssessmentDeliberate timing of water cannon use on the eve of the ASEAN-AMM opening, while both Wang Yi and Rubio were en route to Manila, represents a calculated signal that Beijing's operational posture is not constrained by diplomatic context. The choice to fire on BFAR civilian fisheries vessels (rather than PCG warships) widened the target category and may constitute coercive use of force against unarmed government assets. Philippine vessel mission completion despite interdiction demonstrates Manila's non-compliance posture.
24 Jul 2026
RC07
CCG Water Cannon Attack on Philippine Vessels at Scarborough Shoal — Day 2 with CNN Crew Aboard
SCSSouthernApproaches
ObsOn 24 Jul 2026 CCG vessel 21581 came within ~7 m of BFAR vessel BRP Datu Paduhinog (MMOV 3017) ~12 NM northeast of Scarborough Shoal and fired water cannon at 0753 local followed by two more direct hits at ~0800; BRP Datu Paduhinog also temporarily lost satellite internet connectivity. PCG reported 12 CCG vessels and 3 maritime militia vessels involved; water cannon struck 2 Philippine ships while 2 others faced dangerous manoeuvres. CNN crew was aboard a Philippine vessel and documented the attacks. PCG Spokesperson Tarriela described actions as 'dangerous and unprofessional.' By 0930 a standoff of 10 Philippine vessels vs 15 Chinese ships was ongoing.
AssessmentSatellite connectivity disruption during CCG water cannon engagement — whether deliberate or incidental — is a new tactical detail warranting tracking as a potential electronic warfare precursor capability. The 15 Chinese vs 10 Philippine vessel standoff ratio, combined with militia presence, illustrates the scale of force concentration China now routinely deploys. Media presence (CNN) simultaneously raises escalation risks and provides real-time deterrence documentation value for Manila.
24 Jul 2026
RC03
CCG Water Cannon Day 2 with Maritime Militia Escort – Scarborough Shoal
GreyZoneAndCCGOperations
ObsSecond consecutive day of CCG water cannon attacks at Scarborough Shoal. At approximately 0626 local time a CCG vessel fired water cannon at BRP Cape San Agustin from approximately 400 metres while the Philippine vessel conducted a patrol about 15 nautical miles northeast of Bajo de Masinloc. The BRP Cape San Agustin was shadowed by at least six CCG ships and several maritime militia vessels. At 0735 a second CCG vessel directed water cannon fire. In total 15 Chinese vessels (CCG and maritime militia) faced 10 Philippine ships including three PCG cutters. A CNN crew aboard a Philippine vessel directly observed a CCG ship come within approximately seven metres of a BFAR vessel creating 'serious risk of collision.' China's MFA stated CCG actions were 'reasonable lawful and beyond reproach.'
AssessmentThree violent incidents in a single week at two separate features (Second Thomas Shoal and Scarborough Shoal) constitutes the highest-tempo grey zone coercion surge of 2026. The 15-vessel Chinese formation – combining CCG with maritime militia in a joint coercive cordon – demonstrates layered area-denial at Scarborough. Close-proximity manoeuvre (7m standoff) in the presence of an international media crew shows Beijing's indifference to transparency deterrence. The conjunction of all three incidents with the ASEAN-AMM strongly suggests deliberate calendar-based coercion signalling.
24 Jul 2026
RC03
CCG 'Control Measures' Statement – Third Incident Scarborough Shoal
GreyZoneAndCCGOperations
ObsChina Coast Guard issued an official statement on 24 July asserting it had taken 'control measures' in accordance with the law against multiple Philippine vessels engaged in 'illegal activities' within China's claimed territorial waters of Huangyan Dao. The statement did not elaborate on specific measures but referenced 'the violent assault on CCG personnel by the Philippines at Ren'ai Jiao on July 20' and warned that 'the Philippines shall bear all consequences arising from its actions.' This was the third CCG incident report issued in the same week.
AssessmentThe explicit cross-referencing of the Second Thomas Shoal baton incident in justification for Scarborough Shoal water cannon operations indicates CCG is constructing a legal narrative linking both features into a single enforcement framework. The 'bear all consequences' language is China's highest-intensity public warning formulation and has historically preceded escalation in tactics. The official Xinhua-via-CCG framing of the incidents as 'law enforcement' not coercion is the standard legal-laundering mechanism that insulates CCG from UNCLOS accountability.
| Date | RC | Indicator | Domain | Mag | Effect | Source |
|---|---|---|---|---|---|---|
| 2026-07-06 | RC04 | PLAN SLBM Test — Pacific First-Ever Launch | EastChinaSeaGreyZone | 5 | Signalling | ThinkTank |
| 2026-07-06 | RC07 | PLAN SSBN Pacific SLBM Test — South China Sea Bastion Launch | LuzonStraitAndBashiChannel | 5 | Signalling | MediaReport |
| 2026-07-20 | RC07 | CCG-PN Physical Confrontation at Second Thomas Shoal — Sailor Injured | SCSSouthernApproaches | 5 | Escalation | MediaReport |
| 2026-07-20 | RC03 | CCG Baton Assault on Philippine Navy Marine at Second Thomas Shoal | SouthChinaSeaContestations | 5 | Escalation | OfficialDocument |
| 2026-07-24 | RC03 | CCG Water Cannon Day 2 with Maritime Militia Escort – Scarborough Shoal | GreyZoneAndCCGOperations | 5 | Escalation | MediaReport |
| 2026-07-02 | RC07 | CCG Record Patrol Density at Scarborough Shoal | SCSSouthernApproaches | 4 | Escalation | ThinkTank |
| 2026-07-02 | RC03 | CCG Patrol Surge at Scarborough Shoal | SouthChinaSeaContestations | 4 | Escalation | ThinkTank |
| 2026-07-04 | RC05 | CCG Rotation and Normalisation East of Taiwan | GreyZoneActivity | 4 | Escalation | ThinkTank |
| 2026-07-04 | RC05 | Record PLAN/CCG Maritime Mobilisation First Island Chain | GreyZoneActivity | 4 | Capacity Display | MediaReport |
| 2026-07-07 | RC04 | CCG Armed Vessel Entry — Territorial Waters Senkaku / Approach to Zuihou Maru | EastChinaSeaGreyZone | 4 | Escalation | MediaReport |
| 2026-07-07 | RC05 | PRC Cyberespionage Social-Engineering Network Charged in Taiwan | GreyZoneActivity | 4 | Signalling | OfficialDocument |
| 2026-07-08 | RC04 | Koizumi Ankara Statement — Japan Formally Internationalises SLBM Concern at NATO | EastChinaSeaGreyZone | 4 | Deterrence | OfficialDocument |
| 2026-07-08 | RC05 | CCG Sustained Patrols East of Taiwan Signal New Permanent Presence | GreyZoneActivity | 4 | Escalation | MediaReport |
| 2026-07-09 | RC07 | Chinese Academic Sovereignty Claim Over Batanes Islands — Lawfare Against Bashi Channel Denial Posture | LuzonStraitAndBashiChannel | 4 | Signalling | MediaReport |
| 2026-07-12 | RC03 | China Formal Rejection of 2016 Arbitral Award on 10th Anniversary | SouthChinaSeaContestations | 4 | Signalling | OfficialDocument |
| 2026-07-17 | RC05 | Lanhai 201 Fisheries Research Vessel Surveys Taiwan Eastern EEZ | GreyZoneActivity | 4 | Escalation | ThinkTank |
| 2026-07-19 | RC04 | PLAN Live-Fire Drill Inside Japan Claimed EEZ — First Publicly Disclosed | EastChinaSeaGreyZone | 4 | Escalation | MediaReport |
| 2026-07-19 | RC07 | PLAN Destroyer CNS Kaifeng Live-Fire Drill in Japan EEZ — Philippine Sea Approach to Luzon Strait | LuzonStraitAndBashiChannel | 4 | Escalation | MediaReport |
| 2026-07-20 | RC07 | BRP Sierra Madre Resupply Mission Conducted Under CCG Confrontation Conditions — July 2026 | SCSSouthernApproaches | 4 | Escalation | MediaReport |
| 2026-07-20 | RC03 | US State Department Condemnation and Alliance Reaffirmation — Second Thomas Shoal Incident | SouthChinaSeaContestations | 4 | Deterrence | OfficialDocument |
| 2026-07-21 | RC07 | 17th US-Philippines-Japan Multilateral Maritime Cooperative Activity | SCSSouthernApproaches | 4 | Deterrence | MediaReport |
| 2026-07-21 | RC03 | Mutual Ambassador Summons – Bilateral Diplomatic Crisis | GreyZoneAndCCGOperations | 4 | Signalling | MediaReport |
| 2026-07-21 | RC03 | US–Philippines–Japan 17th Multilateral Maritime Cooperative Activity | GreyZoneAndCCGOperations | 4 | Deterrence | MediaReport |
| 2026-07-22 | RC07 | USS George Washington CSG Westbound Transit of Luzon Strait — Philippine Sea to South China Sea | LuzonStraitAndBashiChannel | 4 | Deterrence | OfficialDocument |
| 2026-07-23 | RC03 | CCG Water Cannon and Dangerous Manoeuvre on BFAR Vessels – Scarborough Shoal Day 1 | GreyZoneAndCCGOperations | 4 | Escalation | MediaReport |
| 2026-07-24 | RC07 | CCG Water Cannon Attack on Philippine Vessels at Scarborough Shoal — Day 2 with CNN Crew Aboard | SCSSouthernApproaches | 4 | Escalation | MediaReport |
| 2026-07-02 | RC07 | Maritime Militia Near-Continuous Deployment at Scarborough as Area Denial Instrument | SCSSouthernApproaches | 3 | Signalling | ThinkTank |
| 2026-07-06 | RC04 | JASDF Scramble — Chinese Aircraft East China Sea (SLBM Day) | EastChinaSeaGreyZone | 3 | Signalling | OfficialDocument |
| 2026-07-07 | RC07 | PLA Aircraft and PLAN Ship Sustained Operations Around Taiwan — Southwestern ADIZ Entries | LuzonStraitAndBashiChannel | 3 | Signalling | OfficialDocument |
| 2026-07-08 | RC05 | OAC Minister Warns CCG Patrols Rewriting Taiwan Strait Status Quo | GreyZoneActivity | 3 | Signalling | MediaReport |
| 2026-07-13 | RC03 | Chinese Vessel Concentration in Philippine EEZ | SouthChinaSeaContestations | 3 | Escalation | MediaReport |
| 2026-07-14 | RC03 | Philippines DOJ Dedicated Maritime Law Unit Established | SouthChinaSeaContestations | 3 | Deterrence | OfficialDocument |
| 2026-07-18 | RC03 | DND Pledges Sustained Military Asset Deployment in WPS | SouthChinaSeaContestations | 3 | Deterrence | OfficialDocument |
| 2026-07-20 | RC05 | Taiwan Conducts Interdepartmental Blockade-Resilience Supply Chain Drills | GreyZoneActivity | 3 | Deterrence | MediaReport |
| 2026-07-21 | RC04 | Japan Diplomatic Protest and Koizumi Farnborough Signal — EEZ Live-Fire | EastChinaSeaGreyZone | 3 | Signalling | OfficialDocument |
| 2026-07-21 | RC03 | 59th ASEAN AMM — ASEAN Fails to Forge Stronger SCS Communiqué Text | SouthChinaSeaContestations | 3 | De-escalation | MediaReport |
| 2026-07-21 | RC05 | PRC United Front Influence Operation Targeting Taiwan Political Divisions | GreyZoneActivity | 3 | Signalling | MediaReport |
| 2026-07-22 | RC03 | Philippines–China FM Mutual Protest Exchange at ASEAN-AMM Margins | GreyZoneAndCCGOperations | 3 | Signalling | MediaReport |
| 2026-07-23 | RC07 | CCG Vessel Departure from Second Thomas Shoal to Mischief Reef Post-Incident | SCSSouthernApproaches | 3 | De-escalation | MediaReport |
| 2026-07-24 | RC03 | CCG 'Control Measures' Statement – Third Incident Scarborough Shoal | GreyZoneAndCCGOperations | 3 | Signalling | OfficialDocument |
| 2026-07-18 | RC07 | NAVAREA XI Warning 26-0324 — Hazardous Operations Zone North of Luzon in Luzon Strait Approach | LuzonStraitAndBashiChannel | 2 | Deterrence | OfficialDocument |
How to Read This Brief
Magnitude
5Major strategic shift — systemic or threshold-crossing
4Significant — materially alters the operational or political landscape
3Moderate — notable development, directional signal
2Low — incremental, corroborating, or background context
1Minimal — noise-level, monitoring only
Strategic Effect
SignallingCommunicates intent or resolve
DeterrenceDesigned to prevent adversary action
Capacity DisplayDemonstration of existing or growing capability
EscalationRaises tension or crosses a threshold
De-escalationReduces tension or creates off-ramps
StabilityErodingDegrades structural conditions for stability
StabilityEnhancingReinforces structural conditions for stability
Mixed / AmbiguousCross-cutting or unclear primary effect
Capability · Intent · Leverage
CapabilityWhat an actor can do
IntentWhat an actor plans or seeks
LeverageWhat an actor uses to influence others
Timeline entries show Obs (raw event) and Assessment (IPSC analysis) separately.
Citation & Licence
Cite as
Indo-Pacific Studies Center. Grey Zone & Sub-Threshold — July 2026, Strategic Brief Issue 002. Indo-Pacific Studies Center, 17 August 2026.
Plain text
Indo-Pacific Studies Center. "Grey Zone & Sub-Threshold — July 2026," Strategic Brief Issue 002. Indo-Pacific Studies Center, 17 August 2026.
Copyright
© 2026 Indo-Pacific Studies Center (www.indo-pacificstudiescenter.org). Licensed under CC BY-NC-ND 4.0 — attribution required; no commercial use; no derivatives. This brief is produced for analytical and informational purposes and does not constitute official policy advice.
© 2026 Indo-Pacific Studies Center · CC BY-NC-ND 4.0 · www.indo-pacificstudiescenter.org
Grey Zone & Sub-Threshold · Strategic Brief · Issue #002