Historical Phases

What happened

Taiwan entered the Chinese imperial system late and left it early. The Qing annexed the island in 1683 and governed it for two centuries as a peripheral frontier, only making it a full province in 1885 — a decade before ceding it to Japan in perpetuity under the Treaty of Shimonoseki after the First Sino-Japanese War. Fifty years of Japanese colonial rule followed: infrastructure, public health, industrial development and education alongside political subordination and, in the war years, forced assimilation. That half-century is the reason Taiwan's twentieth century diverged from the mainland's before 1949 — and a reason Taiwanese identity has never mapped neatly onto Chinese nationalism.

The period covers

• Qing annexation 1683; peripheral frontier administration
• Provincial status granted 1885
• Ceded to Japan in perpetuity, Treaty of Shimonoseki, 1895
• Fifty years of Japanese colonial rule and development

Key events in this phase

What happened

Japan's defeat transferred Taiwan to Republic of China administration in 1945 — an arrangement the ROC treated as restored sovereignty and which later peace treaties left conspicuously unresolved. Relations between the incoming Nationalist administration and the local population deteriorated quickly, culminating in the 28 February 1947 uprising and a violent crackdown that killed thousands and became the founding trauma of modern Taiwanese politics. As the Chinese Civil War turned, Chiang Kai-shek's government withdrew to Taiwan in 1949 with its army, its gold reserves and its claim to be the government of all China — while the Communist victory established the People's Republic in Beijing.

The period covers

• ROC administration of Taiwan from 1945
• The 2-28 Incident and crackdown, February 1947
• ROC government retreats to Taipei, 1949
• Two governments, each claiming to be China

Key events in this phase

What happened

The Korean War transformed Taiwan's position: the US Seventh Fleet entered the strait in 1950 and Taiwan became a Cold War security commitment, formalised in the 1954 Mutual Defense Treaty. Two crises followed over the offshore islands — the First Taiwan Strait Crisis of 1954–55 and the intense artillery confrontation over Kinmen in 1958 — both of which stopped short of general war and both of which established the pattern of testing at the edges rather than at the centre. Politically the position eroded: the UN seat passed to Beijing in 1971, and Washington's recognition followed the PRC in 1979, ending the defence treaty.

The period covers

• US Seventh Fleet deployed to the strait, 1950
• Mutual Defense Treaty, 1954
• First Taiwan Strait Crisis, 1954–55
• Second Taiwan Strait Crisis (Kinmen), 1958
• UN seat transferred to the PRC, 1971

Key events in this phase

What happened

American recognition of Beijing in January 1979 could have ended Taiwan's security position; instead Congress rebuilt it in a different form. The Taiwan Relations Act of April 1979 committed the United States to provide Taiwan with arms of a defensive character and to regard any non-peaceful resolution as a matter of grave concern — without committing to defend it. Combined with the Three Communiqués and later the Six Assurances, this produced the arrangement that has governed ever since: unofficial relations, continued arms sales, and a deliberate refusal to say what the US would do. Taiwan meanwhile remained under martial law, which had run since 1949.

The period covers

• US recognition switches to Beijing, January 1979
• Taiwan Relations Act, April 1979 — arms of a defensive character
• Three Communiqués and, later, the Six Assurances
• Strategic ambiguity established as durable policy

Key events in this phase

What happened

Martial law ended in July 1987 after 38 years, and Taiwan democratised rapidly: opposition parties legalised, parliament fully re-elected, and in March 1996 the first direct presidential election. Democratisation changed the dispute's nature — Taiwan's future became something its population voted on, and a distinctly Taiwanese identity grew steadily at the expense of an exclusively Chinese one. Beijing responded to the 1995–96 election period with missile tests and exercises in the strait; the United States deployed two carrier battle groups. The crisis passed, and left two lessons: Beijing learned the limits of its 1990s military, and drew from it the modernisation programme that followed.

The period covers

• Martial law lifted, July 1987
• Opposition legalised; DPP founded 1986
• Taiwan Strait Crisis missile tests, 1995–96
• First direct presidential election, March 1996

Key events in this phase

What happened

The two decades after the missile crisis ran in opposite directions at once. Economically the strait integrated deeply: Taiwanese manufacturers moved production to the mainland at scale, cross-strait trade and investment grew into the hundreds of billions, and the 2010 ECFA framework formalised the relationship. Politically the gap widened: the DPP won the presidency in 2000, ending half a century of Nationalist rule, and identity surveys showed a steady, one-directional drift toward exclusively Taiwanese self-identification. Beijing's 2005 Anti-Secession Law set out a declared legal basis for non-peaceful means. Interdependence, the theory went, would produce convergence; it did not.

The period covers

• Mass relocation of Taiwanese manufacturing to the mainland
• First DPP presidency, 2000
• Anti-Secession Law, March 2005
• ECFA trade framework, 2010

Key events in this phase

What happened

Under Xi Jinping the PLA underwent its deepest reorganisation since the 1950s, creating theatre commands — the Eastern Theater Command holding the Taiwan direction — and building out naval, air, missile and information capabilities at a pace that changed regional planning assumptions. Politically, Beijing hardened: pressure on Taiwan's remaining diplomatic partners, exclusion from international bodies, and after the DPP's 2016 return to the presidency, the suspension of official cross-strait dialogue. The 2014 Sunflower Movement had already shown the limits of Taiwanese public appetite for closer integration, and Hong Kong's 2019–20 crackdown removed "one country, two systems" as a credible offer.

The period covers

• PLA theatre-command reorganisation from 2015
• Sunflower Movement, 2014
• DPP returns to the presidency, 2016; dialogue suspended
• Hong Kong 2019–20 discredits "one country, two systems"

Key events in this phase

What happened

Tsai Ing-wen's re-election in January 2020 confirmed the political trend, and PLA activity in Taiwan's air defence identification zone grew into a routine feature rather than an episodic signal. The August 2022 visit of US House Speaker Nancy Pelosi triggered the largest exercises in decades — live-fire areas encircling the island, missiles overflying it, and, critically, the effective abandonment of the strait median line as a restraint. What had been an unwritten rule since the 1950s became a line crossed routinely. Further exercises followed political events in 2023 and 2024. The significance was less the drills than the ratchet: each round established a new normal that was not given back.

The period covers

• Tsai Ing-wen re-elected, January 2020
• Routine large-scale ADIZ activity established
• Pelosi visit and encirclement exercises, August 2022
• Median line restraint effectively abandoned

Key events in this phase

What happened

Lai Ching-te won the January 2024 presidential election, giving the DPP an unprecedented third consecutive term — but simultaneously losing the legislative majority to a Kuomintang and Taiwan People's Party bloc, producing a divided government in which defence budgets became contested domestic politics. Beijing, which regards Lai with particular hostility, responded to his May inauguration with major exercises and roughly doubled detected air activity around the island. A separate instrument became prominent in February 2024: China Coast Guard patrols in waters around Kinmen, asserting law-enforcement jurisdiction where Taiwan administers. Undersea cable damage incidents near Matsu and elsewhere added a civil-infrastructure dimension.

The period covers

• Lai Ching-te elected January 2024; legislature lost to the opposition
• Detected PLA activity roughly doubles after May 2024
• China Coast Guard patrols around Kinmen from February 2024
• Undersea cable incidents raise civil-infrastructure exposure

Key events in this phase

What happened

The current phase is defined less by escalation than by uncertainty on the deterrence side of the ledger. Detected PLA air activity has run closer to its pre-2024 baseline since early 2026 — read by analysts as a recalibration of coercion rather than a relaxation of aims — while coast guard presence and information pressure continued — and widened geographically, with Beijing publicly describing patrols east of Taiwan as routine law enforcement in July 2026. Taiwan's special defence budget passed in May 2026 at NT$780bn, well below the NT$1.25tn the executive sought, after months of gridlock in the opposition-held legislature, which removed roughly NT$470bn of domestic uncrewed-systems funding while leaving foreign procurement intact. In Washington the pattern ran both ways: the largest package ever notified for Taiwan was entered in December 2025 and the delivery backlog fell through the first half of 2026, while a further $14bn package was left unapproved and publicly framed as leverage in dealings with Beijing. Japan, having signalled possible involvement in a contingency, absorbed sustained Chinese economic pressure of its own, while US access arrangements in northern Luzon deepened. Deterrence in this phase is being tested through budgets, signals and credibility rather than through force.

The period covers

• Detected PLA air activity nearer pre-2024 baseline through 2026
• Special defence budget passed May 2026 at NT$780bn after ~NT$470bn of domestic drone funding was cut
• Largest-ever US package notified Dec 2025; a further $14bn left unapproved May 2026
• Justice Mission-2025 exercises, 29–31 December 2025 — the eighth since 2022
• PRC economic and informational pressure on Japan from late 2025
• Deepening US access arrangements in northern Luzon
• Coast guard patrols east of Taiwan publicly acknowledged, July 2026

Key events in this phase