April 1895Key eventTaiwan
PoliticalTerritorial change
The Treaty of Shimonoseki ends the First Sino-Japanese War, and the Qing empire cedes Taiwan and the Penghu islands to Japan in perpetuity. Fifty years of Japanese colonial rule follow, bringing infrastructure, public health, industrial development and schooling alongside political subordination and, in the war years, forced assimilation.
Why it mattersTaiwan's separation from mainland governance begins here, in 1895 — not in 1949. That half-century of separate development is a principal reason Taiwanese political identity never mapped neatly onto Chinese nationalism, and it is routinely compressed in both claimants' narratives.
October 1945Key eventTaipei
PoliticalTerritorial change
After Japan's defeat, Taiwan is placed under the administration of the Republic of China. The ROC treats this as restored sovereignty; the post-war peace treaties that followed conspicuously did not specify to whom Japan's renounced title passed.
Why it mattersThe legal ambiguity created in 1945 has never been resolved, and every competing legal argument about Taiwan's status — from Beijing, Taipei and third parties alike — still traces back to what these documents did and did not say.
February 1947Key eventTaipei
PoliticalHumanitarian
A dispute over confiscated contraband in Taipei triggers an island-wide uprising against the incoming Nationalist administration. The response is a violent crackdown in which thousands are estimated to have been killed, including much of the local educated elite. Casualty estimates vary widely and remain debated.
Why it matters2-28 is the founding trauma of modern Taiwanese politics and the origin of the political divide that still shapes the island's parties. It is also why democratisation, when it came, was inseparable from questions of Taiwanese identity.
December 1949Key eventEssentialTaipei
PoliticalTerritorial changeMilitary
Defeated in the Chinese Civil War, Chiang Kai-shek's Nationalist government withdraws to Taiwan with its remaining forces, gold reserves and its claim to be the legitimate government of all China. The Communist victory establishes the People's Republic in Beijing in October. Two governments now claim to be China; neither concedes.
Why it mattersThis is the origin of the dispute in its modern form — and its essential character. The Taiwan question is the unfinished end of a civil war, not an invasion of one state by another, which is why the legal arguments are so intractable and why "restoring the status quo" means different things to every party.
1954–55Key eventEssentialKinmen
MilitaryDiplomaticOutlying islands
PRC forces shell Kinmen and take the Yijiangshan islands, prompting the United States and the ROC to conclude a Mutual Defense Treaty in December 1954 and the US Congress to pass the Formosa Resolution. The crisis subsides in 1955 without general war.
Why it mattersThe first crisis established the pattern the system still follows: pressure applied to the periphery rather than the centre, calibrated to test the strength of an outside commitment without triggering a war. Seventy years later the instruments have changed and the logic has not.
August 1958Key eventKinmen
MilitaryDiplomaticOutlying islands
PRC artillery begins an intense bombardment of Kinmen; the United States supports resupply of the islands without directly entering combat. The confrontation settles into a ritualised, alternating-day shelling that continued in reduced form for two decades.
Why it mattersThe 1958 crisis is the clearest historical demonstration of pressure as a long-running condition rather than an event — a confrontation that became routine and was sustained for twenty years. That is the closest historical analogue to today's grey-zone activity, and the reason Kinmen remains the module's reference point.
October 1971Key event
DiplomaticPolitical
UN General Assembly Resolution 2758 recognises the PRC as the only legitimate representative of China at the United Nations, and the ROC delegation departs. Diplomatic recognition of Taipei declines steeply over the following decade.
Why it mattersThis began Taiwan's international isolation, which is a continuing instrument of pressure rather than a settled historical fact: participation in international bodies, from health to aviation, remains actively contested. Beijing and Taipei also dispute what the resolution actually determined about Taiwan's status, as opposed to China's representation.
January 1979Key eventEssential
DiplomaticPolitical
The United States establishes diplomatic relations with the PRC, de-recognises the ROC and terminates the 1954 Mutual Defense Treaty, while stating that it acknowledges the Chinese position that there is one China and Taiwan is part of it.
Why it mattersRecognition of Beijing removed Taiwan's formal security guarantee and set up the improvised replacement that has governed ever since. The precise wording — "acknowledges" rather than "accepts" — remains actively disputed and is the hinge of most legal argument about US policy.
April 1979Key eventEssential
PoliticalWeapons deliveries
Congress legislates a replacement framework: the United States will make available arms of a defensive character, maintain the capacity to resist coercion against Taiwan, and treat any non-peaceful resolution as a matter of grave concern. It does not commit the United States to defend Taiwan.
Why it mattersThis is the statutory foundation of strategic ambiguity, designed to restrain both sides at once — deterring Beijing from attacking and Taipei from declaring independence. Its weakness is structural: it works only while it is believed, which makes credibility itself an expendable resource, and that is exactly what has been in question during 2026.
July 1987Key eventTaipei
Political
President Chiang Ching-kuo ends the martial law that had been in force since 1949. Opposition parties are legalised, press restrictions ease and Taiwan's transition to democracy begins in earnest, with the Democratic Progressive Party having been founded the previous year.
Why it mattersDemocratisation changed what the dispute is about. Once Taiwan's future became something its population votes on, no agreement between elites could settle it — and the identity shift that followed has moved in one direction ever since.
1995–96Key eventEssentialTaiwan Strait
MilitaryDiplomaticThe Strait and the median line
Beijing conducts missile tests and exercises in waters near Taiwan around President Lee Teng-hui's US visit and the run-up to Taiwan's first direct presidential election. The United States deploys two carrier battle groups to the area. The crisis passes without conflict.
Why it mattersThe most consequential crisis in the modern period, for both sides. It demonstrated the limits of the PLA of the 1990s against American power — and Beijing's response was the sustained military modernisation programme that has changed the regional balance since. Much of what this module describes is downstream of the lesson drawn here.
March 1996Key eventTaipei
PoliticalThe Strait and the median line
Taiwanese voters directly elect their president for the first time, returning Lee Teng-hui, with the vote held under the shadow of the missile tests and exercises of the preceding months.
Why it mattersHeld under explicit military pressure and unaffected by it, the 1996 election is the origin of a pattern that has repeated ever since: demonstrations of force before Taiwanese elections have not produced the outcomes Beijing sought, and have generally hardened opinion instead.
March 2005Key eventEssential
PoliticalDiplomatic
The National People's Congress adopts a law stating that the PRC may employ "non-peaceful means" if Taiwan secedes, if a major incident entailing separation occurs, or if possibilities for peaceful reunification are exhausted.
Why it mattersThe law is the PRC's declared legal basis for the use of force and the closest thing to a stated threshold in the whole system. Its conditions are deliberately open to interpretation — including the third, which sets no external test at all — and it is quoted in most subsequent official PRC statements.
June 2010Key event
EconomicDiplomaticSemiconductors and economic exposure
Taiwan and the PRC sign the Economic Cooperation Framework Agreement under the Ma Ying-jeou administration, formalising tariff reductions and a broader liberalisation of cross-strait trade after two decades of deep de facto economic integration.
Why it mattersECFA is the high-water mark of the engagement theory: that economic integration would produce political convergence. It did not — identity and political preferences continued moving the other way — and the framework has since become a source of leverage, with Beijing suspending tariff concessions in response to political events.
March 2014Key eventTaipei
Political
Students and activists occupy Taiwan's legislature for over three weeks in protest at the handling of a cross-strait services trade agreement. The agreement is shelved, and the movement reshapes Taiwanese politics.
Why it mattersThe Sunflower Movement marked the point at which further economic integration became politically unsellable in Taiwan regardless of its economic merits. It is the clearest evidence that the engagement strategy had run into a public opinion constraint, and it fed directly into the 2016 change of government.
January 2016Key event
PoliticalLeadership change
Tsai Ing-wen wins the presidency and the DPP takes a legislative majority for the first time. Beijing, which requires acceptance of the "1992 consensus" as a precondition, suspends official cross-strait communication channels.
Why it mattersThe suspension of dialogue is a structural feature of the current period rather than a passing rupture: for a decade the two governments have had no routine official channel, which removes the mechanism that would normally manage misunderstanding — and makes accidents more consequential than they would otherwise be.
January 2020Key event
PoliticalLeadership change
Tsai Ing-wen wins re-election with the largest vote total in Taiwan's democratic history, in a campaign heavily shaped by the Hong Kong protests and crackdown of 2019.
Why it mattersHong Kong settled the "one country, two systems" question in Taiwanese public opinion, removing Beijing's principal political offer. What remains in the absence of an attractive proposition is pressure — which is the strategic logic underlying most of what this module tracks.
August 2022Key eventEssentialTaiwan Strait
DiplomaticMilitaryThe Strait and the median line
US House Speaker Nancy Pelosi visits Taipei. Beijing responds with the largest military exercises around Taiwan in decades, announcing live-fire areas on multiple sides of the island and firing ballistic missiles that overflew it, alongside trade measures and the suspension of several bilateral dialogue channels with Washington.
Why it mattersAugust 2022 is the hinge of the current period. The exercises themselves ended; the changes they introduced did not. This is where encirclement-style activity became an available instrument and where the median line stopped functioning as a restraint.
From August 2022Key eventEssentialTaiwan Strait
MilitaryThe Strait and the median line
Following the August 2022 exercises, crossings of the Taiwan Strait median line by PLA aircraft become routine rather than exceptional, and Beijing publicly rejects the line's existence as a recognised limit. Taiwan's defence ministry continues to report crossings daily.
Why it mattersThis is the single clearest illustration of how grey-zone pressure actually works: no announcement, no incident, no threshold crossed — an unwritten restraint observed for half a century simply stopped being observed, and the new normal was never given back. It is also why "no significant change" in a reporting period can still describe deterioration.
January 2024Key eventTaipei
PoliticalLeadership change
Lai Ching-te wins the presidency with around 40% of the vote, giving the DPP an unprecedented third consecutive term — while the party loses its legislative majority to a Kuomintang and Taiwan People's Party bloc, producing a divided government.
Why it mattersThe split result is the most consequential fact in current Taiwanese politics for this module. Defence budgets, procurement and resilience spending now require agreement between a presidency Beijing refuses to deal with and a legislature that disputes its priorities — making Taiwan's own defence effort a genuine variable rather than an assumption.
From February 2024Key eventKinmen
MaritimePoliticalOutlying islands
Following an incident in which two Chinese nationals died when their speedboat capsized during a pursuit by Taiwanese authorities near Kinmen, the China Coast Guard begins regular patrols in waters around the islands and asserts a right to conduct law-enforcement inspections there. The patrols have recurred since.
Why it mattersThis opened a second, non-military channel of pressure — and a deliberately awkward one. Coast guard activity asserts jurisdiction using the language of law enforcement rather than force, which makes a military response disproportionate and a non-response a tacit concession. It is the purest example of grey-zone method in the module.
May 2024Key eventTaiwan Strait
MilitaryThe Strait and the median line
Days after Lai Ching-te's inauguration, the PLA conducts major exercises around Taiwan framed by Beijing as punishment for his inaugural address. Detected air activity around the island subsequently roughly doubles, with Taiwan reporting monthly totals in excess of 300 sorties at peak.
Why it mattersThe step-change in reported activity after May 2024 established the baseline against which everything since is measured — including the partial return toward earlier levels during 2026. Note that these are detections published by one government, not independently measured figures, and the module treats them as such.
2023 and 2025Key eventMatsu
MaritimeEconomicCivil resilience and societal pressure
Undersea cables serving Taiwan are damaged in a series of incidents, including the severing of both cables to the Matsu islands in 2023 and further cases in 2025 in which Taiwanese authorities detained or investigated vessels. Attribution has been contested in most cases, and cable damage from fishing gear and anchors is common worldwide.
Why it mattersThese incidents made civil-infrastructure vulnerability concrete and exposed the attribution problem that defines this category: deliberate damage is cheap to attempt, hard to prove and easy to deny. Taiwan's response — faster repair arrangements, an international cable-resilience initiative and investment in satellite backup — is the clearest example in the module of resilience as a response to pressure.
May 2025Key eventTaiwan
EnergyPoliticalCivil resilience and societal pressure
Maanshan unit 2 is shut down on 18 May 2025, ending commercial nuclear generation in Taiwan. Six reactors are now shut down. The decision completes a phase-out legislated years earlier, and it lands on a system that imports almost all of its primary energy — the share nuclear had carried is absorbed mainly by natural gas, the fuel with the shortest reserve cover. A referendum on restarting the plant in August 2025 drew roughly 74 per cent support on a turnout near 30 per cent, below the threshold required to carry, so it did not pass. The Ministry of Economic Affairs subsequently approved a Taipower feasibility study finding Kuosheng and Maanshan restartable and Chinshan not, and Taipower filed reactivation plans with the Nuclear Safety Commission in March 2026. Regulatory review is estimated at 18 to 24 months.
Why it mattersThis is the structural fact underneath every claim Vigil makes about Taiwanese energy resilience, and it is a completed change rather than a trend: nuclear output is zero and has been since this date. It matters for the pressure system because it removes the one generation source that does not depend on a continuously arriving cargo, and because the restart question is now being contested through two separate tracks at once — a regulatory review at the Nuclear Safety Commission and a political one, with the Legislative Yuan approving a further referendum proposal in August 2026. Vigil records the status and the process. It does not forecast whether any reactor restarts, and no restart should be read as operational or imminent — on the published review timeline none is possible before roughly 2028.
November 2025Key event
DiplomaticPoliticalNorthern approaches and Japan
Japanese Prime Minister Sanae Takaichi indicates that a Chinese armed attack or blockade of Taiwan could constitute a situation permitting a Japanese military response. Beijing reacts with a sustained campaign of economic and informational pressure on Japan that continues into 2026.
Why it mattersSignificant in two directions. It is the most explicit modern Japanese statement linking Taiwan to Japan's own defence, and it triggered a demonstration that economic coercion is applied to third countries over Taiwan-related positions, not only to Taiwan. Whether other states read that as deterrent or as a cost of alignment is one of the module's open questions.
December 2025Key event
Weapons deliveriesDiplomaticThe Strait and the median line
On 17–18 December 2025 the US administration notified Congress of more than $11bn in new Foreign Military Sales cases for Taiwan — reported at $11.1bn and the largest single package by value in the history of the relationship, exceeding the previous $8.4bn high. Reported contents include HIMARS launchers and munitions, sixty M109A7 Paladin howitzers, Javelin anti-armour missiles and ALTIUS loitering munitions. The notification raised the total value of notified-but-undelivered cases — the backlog — to roughly $32bn, of which around 46 per cent was by then asymmetric systems, against 22 per cent in late 2023.
Why it mattersA congressional notification is the first rung of a long ladder, not a delivery, and this module's standing discipline separates notification from contract, from backlog, from delivery, from fielding. What the notification does establish is that the pipeline did not stop: any account of 2026 that describes US transfers only as slowing omits the largest package ever notified, entered five months earlier. It also shifted the composition of what is owed toward the asymmetric systems Taiwan's own defence debate is about, which is a more informative fact than the headline value.
29–31 December 2025Key eventEssentialWaters and airspace around Taiwan
MilitaryMaritimeThe Strait and the median line
The PLA Eastern Theater Command announced joint exercises codenamed "Justice Mission-2025" on the morning of 29 December 2025, involving Army, Navy, Air Force and Rocket Force units in waters and airspace around Taiwan. It was the eighth major exercise around the island since August 2022 and ran until the Command declared its conclusion late on 31 December, with the heaviest activity on the first two days. Taiwan's defence ministry reported 89 aircraft and 28 naval vessels detected on day one — of which 13 were China Coast Guard rather than navy — and 71 aircraft with a further 15 coast guard vessels on day two; 29 December was the second-largest single-day ADIZ entry on record. Announced closure areas were published partly through Eastern Theater Command navigation warnings and partly through the PRC Maritime Safety Administration, with one further area announced by radio only. Accounts differ on the total: Taiwan's defence ministry identified seven designated zones, while one compilation counts eight.
Why it mattersThis is the reference point against which every later statement about the 2026 activity baseline is measured, and three things about it are load-bearing. First, the Eastern Theater Command's own stated objectives included "blockading key ports and territory" alongside combat-readiness patrols and deterrence of outside intervention — Vigil records that as declared exercise language, not as evidence that any blockade occurred or was attempted, and no interference with commercial shipping was reported. Second, the announced areas sat closer to Taiwan than in previous exercises, with several overlapping waters Taiwan claims as territorial sea; no PRC vessel entered that territorial sea, and roughly ten rockets are reported to have impacted within the contiguous zone twelve to twenty-four nautical miles out — the first such firings since 2022. Declared zone geometry, actual vessel entry and munition impact are three different facts and secondary reporting routinely collapses them. Third, coast guard vessels operated inside a military joint exercise, which is the clearest documented instance of the law-enforcement instrument and the military one being used together.
April 2026
Weapons deliveriesThe Strait and the median line
The third and final batch of M1A2T Abrams main battle tanks arrives in Taiwan at the end of April 2026, completing that Foreign Military Sales case. The published backlog of notified-but-undelivered US cases falls from roughly $32.0bn to $29.72bn on its completion.
Why it mattersVigil records this because a completed case is the only way to see the whole ladder at once — notification, contract, delivery, and entry into service — and because the backlog figure moving is the ladder made visible in a published number. The contrast cases matter as much: 500 Stinger missiles took roughly a decade from notification to delivery in 2025, Paladin howitzers notified in December 2025 are now reported as delivering in 2030, and other cases are held by an appropriation dispute in Taipei rather than by production. Delivery is not readiness, and this record asserts none.
May 2026Key eventTaipei
PoliticalWeapons deliveriesThe Strait and the median line
After months of gridlock, Taiwan's Legislative Yuan passes a multi-year special defence budget of NT$780bn — substantially more than the opposition's initial NT$380bn counter-proposal, and roughly 38% below the NT$1.25tn the executive had sought to fund US procurement, domestic industry and an integrated air-defence programme.
Why it mattersThis is what deterrence looks like when it runs through a democracy: contested, reduced and slow. The outcome is neither the collapse some reporting implied nor the commitment the executive sought, and the more informative indicator from here is execution — what is actually contracted and spent — rather than the headline figure.
2026Key event
Weapons deliveriesDiplomaticThe Strait and the median line
In mid-May 2026 President Trump said publicly that he had not approved a further arms package for Taiwan, reported at around $14bn, that the decision "depends on China", and that it was a good negotiating chip. President Lai Ching-te responded that arms purchases from the United States are the most important deterrent of regional conflict. A February 2026 executive order had reoriented US arms-transfer policy around allied defence spending and strategic geography, and a Trump–Xi call on 4 February was followed by Beijing urging Washington to handle Taiwan arms sales with "prudence".
Why it mattersDeterrence is a belief held by the other side, and its cheapest component is credibility. Publicly linking Taiwan arms transfers to a broader negotiation with Beijing is consequential independently of what is ultimately delivered. But this statement is not evidence of a general slowdown and should not be read as one: it concerns a PROSPECTIVE package, and five months earlier the same administration notified Congress of the largest package ever approved for Taiwan. Through the same period deliveries continued and the notified-but-undelivered backlog fell. Notification, approval and delivery are separate states moving on separate clocks, and this record covers only the first.
June – July 2026Key event
Weapons deliveriesPoliticalThe Strait and the median line
Taiwan's Cabinet proposes a standalone special budget of NT$210bn — about US$6.6bn over six years — for domestically produced uncrewed systems on 18 June 2026, covering reported procurement of 1,446 coastal reconnaissance drones, 208,200 coastal attack drones and 1,320 uncrewed surface vessels. The bill exists because the Legislative Yuan had removed approximately NT$470bn of domestic uncrewed-systems funding from the NT$1.25tn special defence package in May, cutting it to NT$780bn while leaving NT$300bn and NT$480bn allocated to two tranches of foreign procurement. Opposition parties, holding a combined majority, voted on 26 June to delay review; committee review concluded on 27 July without agreement, leaving the bill outstanding.
Why it mattersThis is the clearest case in the module of the difference between an appropriation and a capability, and of a legislature making a compositional choice rather than an austerity one: what was cut in May was the indigenous drone programme specifically, while foreign procurement was preserved. The same deadlock reaches outward — the June 2026 review of the US arms backlog names NASAMS and the Tactical Mission Network as cases held up by the special procurement budget dispute in Taipei, which makes a domestic legislative argument a documented cause of delay in an external deterrence pipeline. Vigil states what was proposed, what was cut and what has not passed. It does not predict the outcome, and reads neither approval nor delay as a measure of intent.
June 2026
MilitaryPoliticalCivil resilience and societal pressure
Taiwan's defence ministry confirms in June 2026 that all education mobilisation call-ups are standardised at fourteen days, replacing the previous five-to-seven-day programme and removing the double-credit arrangement that had softened the fourteen-day format since it was piloted in 2022. The ministry reports a 93 per cent match rate for the policy of returning reservists to their original posts, allowing training in fixed groups, and states an intention to expand realistic training and to revise regulations covering female reservists. Reserve mobilisation is administered by the All-Out Defense Mobilization Agency, formed on 1 January 2022 by merging the mobilisation office with the Armed Forces Reserve Command.
Why it mattersReserve reform is one of the most frequently cited measures of Taiwanese preparedness and one of the least often stated in figures. These two — the fourteen-day standard and the 93 per cent post-matching rate — are published, dated and falsifiable, which makes them usable where "reserve reform continues" is not. Vigil records the policy and the stated match rate. It publishes no assessment of reserve readiness, no strengths and no mobilisation timelines, and a training standard is an input rather than a demonstrated capability.
2026Key eventTaiwan Strait
MilitaryThe Strait and the median line
Detected PLA air activity around Taiwan runs closer to pre-2024 levels through the first half of 2026, after the elevated tempo that followed May 2024. Analysts read the change as an adjustment in coercion strategy rather than a reduction in objectives, with reporting simultaneously describing a more regular China Coast Guard presence, including east of Taiwan.
Why it mattersThe most important current entry in the module, and the easiest to misread. A lower sortie count is not de-escalation if pressure has moved into instruments that are not counted — coast guard presence, economic measures, information operations. This is precisely why Vigil tracks the system rather than the number.
June – July 2026Key eventWaters east of Taiwan
MaritimePoliticalNorthern approaches and Japan
Until June 2026 China Coast Guard activity in waters east of Taiwan had occurred only within announced military exercises. In June a task group led by the cutter Daishan began patrols there, described by the coast guard as law enforcement including vessel inspection, fishery protection and rescue. On 4 July a second task group led by the cutter Xiushan replaced it and continued the patrols, with the service stating it would strengthen law enforcement in what it called China's jurisdictional waters. Taiwan's authorities reject the characterisation. The rotation drew statements of concern from regional governments.
Why it mattersThis module's standing question about the eastern patrols was continuity rather than occurrence, and a named task-group rotation answers it in a way that a detection count cannot: relieving one formation with another is how a service sustains a presence it intends to keep. The language matters as much as the hulls. "Jurisdictional waters" is the undefined formula of the 2021 Coast Guard Law, and the 2024 administrative procedures issued under it set out boarding, inspection and detention of foreign vessels in waters Beijing deems within that jurisdiction. Vigil describes the assertion and the instruments that express it; it does not adjudicate the claim, and records that no such enforcement has been applied to shipping bound for Taiwan's main ports.
10 August 2026Key eventCentral Taiwan
MilitaryPoliticalCivil resilience and societal pressure
Between 14:30 and 15:00 on 10 August 2026, mobile data speeds were deliberately reduced across seven jurisdictions in central Taiwan — Taichung, Chiayi City, and Miaoli, Changhua, Nantou, Yunlin and Chiayi counties — as the civil component of the Han Kuang exercise. It was Taiwan's first mobile-network throttling exercise. The National Communications Commission published the scope roughly three weeks in advance, including the services that would be excluded from the throttling: voice calls, emergency calls to 110 and 119, text messaging and Public Warning cell-broadcast alerts, together with fixed broadband, Wi-Fi carried over fixed broadband, landline telephony, and military and other dedicated networks. As officially described, the exercise simulated the reduced bandwidth that emergency network measures — congestion, disaster roaming and traffic prioritisation — would produce; the regulator stated that it was not an internet shutdown. Wire reporting gives the ceiling applied to mobile web traffic as 256 Kbps, described elsewhere as roughly one per cent of normal 4G and 5G capacity.
Why it mattersThe significant thing is not that connectivity was degraded but that the degradation was scoped, announced and bounded — and that the boundary was drawn around exactly the services a population needs in an emergency. A state that can publish, in advance, which of its own communications it is willing to give up and which it is not, is describing a continuity doctrine rather than running a stunt. This module's standing position is that resilience is the trackable part of deterrence because programmes are either delivered or not; this is delivery, and it is the first of its kind. What the exercise does NOT do is reproduce a wartime cause. Throttling reproduces a condition — degraded mobile data — through an administrative mechanism. Infrastructure damage, power disruption, cyber intrusion, electronic interference and network saturation are separate hypothetical mechanisms that could produce a comparable condition in a conflict, and none of them was simulated, tested or observed here. Vigil makes no assessment of how the public or agencies performed.
12 August 2026Key eventWaters east of Taiwan; Hualien; Suao
MaritimeMilitaryNorthern approaches and Japan
On 12 August 2026 Taiwan's navy and coast guard conducted their first joint anti-blockade exercise, escorting a simulated merchant vessel — a Yushan-class landing platform dock standing in for the merchantman — through waters off the east coast to Hualien and Suao, where the cargo was offloaded and moved inland. A minesweeper cleared and marked the channel. The Coast Guard Administration described the purpose as cross-agency coordinated response and maritime defence resilience; it was the first time the administration had run an anti-blockade drill with the navy. On the same morning, between roughly 06:30 and 09:30, the PLA Navy Type 054A frigate Honghe and the Indonesian navy frigate KRI I Gusti Ngurah Rai conducted a joint exercise in waters east of Taiwan covering formation manoeuvring, maritime communications and replenishment at sea. It was the first exercise China has conducted with a foreign navy in those waters and the first it has publicly announced there. Taiwan's Mainland Affairs Council condemned the announcement as an infringement of sovereignty and a threat to regional security, and Taipei asked Jakarta to explain its participation; Indonesia said the exercise was not threatening. The US State Department urged Beijing to stop military pressure on Taiwan. Chinese presence east of the island has grown since Beijing began what it calls law-enforcement patrols there in June 2026.
Why it mattersThe eastern approaches are where the module's two live questions meet. Taiwan's whole resilience case rests on being resupplied from the side of the island away from the strait, which is what the escort drill rehearsed and why the destination ports matter more than the ships. Beijing's law enforcement patrols and now this exercise are the counter-argument, made administratively rather than militarily: not that the eastern approaches can be closed, but that they are not exclusively Taiwan's. Bringing a third state's warship into them changes the character of the claim, because a bilateral exercise implies a normal maritime space in which normal navies train — which is precisely the proposition Taipei disputes. Nothing here establishes that Indonesia endorses Beijing's position, and Jakarta has not said so.
13 August 2026Northern Taiwan
MilitaryPoliticalCivil resilience and societal pressure
The second round ran between 14:30 and 15:00 on 13 August 2026 across seven northern jurisdictions — Taipei, New Taipei City, Keelung, Taoyuan, Hsinchu City, and Hsinchu and Yilan counties — under the same National Communications Commission instruction as the 10 August round, and on the last full day of Han Kuang. Mobile web traffic was slowed to 256 Kbps, leaving little beyond text usable; video, streaming, video calling and large transfers were the practical casualties. The same exclusions applied: voice, 110 and 119, SMS, cell-broadcast alerts, fixed broadband and Wi-Fi, and military and dedicated networks. Fourteen cities and counties were covered across the two rounds. President Lai Ching-te publicly apologised for the inconvenience and described the drill as necessary. Areas outside the two named groups — including Kaohsiung, Tainan, Hualien, Taitung and Pingtung — were not part of either window.
Why it mattersRecorded separately from the 10 August round because the geography, the date and the population affected all differ, and because the second round is what makes the first a policy rather than a one-off. The jurisdiction lists are held in full here so that any later summary can be checked against them: the recurring misreading of this event is that Taiwan "switched off the internet", and the only durable defence against that is a record showing two dated, bounded regional windows and a list of what kept running. The 9 August brief named the observable as what the government would report about which components were actually exercised. This is that report, for one component.
14 August 2026Taiwan (national)
MilitaryPoliticalThe Strait and the median line
Taiwan's 42nd Han Kuang exercise concluded on 14 August 2026 at Bo'ai Camp in Taipei, ten days after it began on 5 August, with the chief of the general staff, service chiefs and regional commanders present. Defence Minister Wellington Koo said the exercise had run with fully operational command centres at every level for the first time and had continued the unscripted format, with units responding to developing orders rather than a rehearsed sequence; he praised participating troops and told officers to address the problems the exercise had identified. Reporting describes it as Taiwan's largest military exercise since 1984, mobilising more than 20,000 reservists. Its components across the ten days included the two mobile-network throttling windows recorded separately here, dispersal of weapons production and mobilisation of civilian manufacturing, urban resilience training run inside the military exercise, and the first joint navy–coast guard anti-blockade drill. China's defence ministry issued its first official comment on the exercise on its final day, spokesperson Chen Xi calling it a posturing, wasteful charade and accusing the governing party of stoking war panic.
Why it mattersThe 9 August brief named the observable for after 14 August: what the government would report about which components were actually exercised. This is that report, and it is a report about scope and command architecture, not about performance. The single substantive claim is the one about command centres — running every level live and unscripted is the difference between testing a plan and testing an organisation, and it is the element that produces the "issues identified" the minister referred to. Vigil makes no assessment of how the exercise went; the ministry has not published a findings document and none of the identified problems has been described publicly. Beijing's characterisation is recorded as a position.
August 2026Key eventKinmen; Xiamen
EconomicPoliticalOutlying islands
Municipal authorities in Xiamen announce twelve measures on 18 August 2026 to deepen cross-strait exchange, several aimed directly at Kinmen, which lies a few kilometres offshore and is administered by Taiwan. Most concern trade, tourism, cultural exchange and support for Taiwanese businesses, including a distribution hub for Taiwanese agricultural and fishery products. The consequential ones are infrastructural: accelerating the Xiamen section of a proposed Xiamen–Kinmen bridge, studying a Kinmen section, examining an electricity connection between the two, and advancing gas infrastructure that could support a future link. They follow an April 2026 package promoting cross-strait water, electricity, gas and bridge connections, to which Taipei's Mainland Affairs Council responded that such projects touch national security, border control and governmental authority and cannot be decided unilaterally.
Why it mattersAlmost everything this module records about cross-strait pressure is coercive. This is the other instrument, and it is aimed at the one place where it is geographically plausible: an offer of infrastructure that would, if accepted, create exactly the dependence the module's energy and logistics records describe as Taiwan's structural vulnerability. It is announced by a municipality rather than by Beijing's Taiwan Affairs Office, which is part of how integration measures are framed as local and practical rather than political. The timing, ahead of local elections in November 2026, is recorded as context rather than as motive. Nothing here has been accepted, and Vigil reads neither the offer nor its rejection as a forecast.
20 August 2026Key eventTaipei
PoliticalMilitaryEconomicThe Strait and the median line
Taiwan's Executive Yuan approved a central government budget proposal for 2027 on 20 August 2026 totalling NT$3.9266 trillion, of which NT$1.1225 trillion is for national defence — the first time the figure has exceeded NT$1 trillion, equivalent to about US$35.1 billion and to 3.01 per cent of projected GDP. The figure combines the regular defence budget with the special budgets used to fund major procurement, and stands roughly 18 per cent above the NT$949.5 billion budgeted for 2026. President Lai Ching-te described defence investment as an investment in peace and stability across the strait and has set a target of 5 per cent of GDP by 2030. The proposal was to be sent to the Legislative Yuan for review by the end of the month. Separately, a proposed NT$210 billion drone procurement bill remains unresolved in the legislature, and an official audit has reported technical shortcomings in counter-drone development.
Why it mattersA cabinet budget proposal is a statement of intent by the executive and nothing more; Taiwan's governing party does not control the Legislative Yuan, and the same chamber is where the drone procurement bill has stalled. The module's standing discipline on legislation applies exactly as it does to sanctions bills elsewhere on this site: the observable is enactment and then disbursement, not approval. What the proposal does establish is the trajectory the executive is committing to in public and the gap it is committing to close — 3.01 per cent now against 5 per cent by 2030 — which is a measurable claim that will either be met or not.
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