The short answer
Timor-Leste’s path out of Portuguese rule collapsed into civil conflict, a unilateral declaration of independence and an Indonesian invasion within twenty months of Portugal’s revolution. The United Nations rejected the resulting annexation, but occupation continued until 1999.
Chronology
A timeline of the turning points
Portugal’s Carnation Revolution
Political change in Lisbon opened a rapid decolonisation process in Portuguese Timor.
Civil conflict
A UDT move against the colonial administration triggered fighting with FRETILIN, which gained control of most territory.
Independence declared
FRETILIN proclaimed the Democratic Republic of East Timor and named Francisco Xavier do Amaral president.
Indonesia invaded
Indonesian forces launched a large-scale assault on Dili and other centres.
UN Security Council Resolution 384
The Council deplored the intervention and called for Indonesian forces to withdraw without delay.
Indonesia claimed annexation
Indonesia incorporated the territory as a province, a status the United Nations did not recognise.
Nicolau Lobato killed
The resistance leader was killed during an Indonesian military operation, but organised resistance continued.
Why did decolonisation become a civil conflict?
Portugal’s 1974 revolution ended the dictatorship that had maintained a distant colonial administration in Timor. New parties formed quickly: UDT initially favoured a gradual transition, FRETILIN demanded independence and APODETI advocated integration with Indonesia. Institutions capable of managing the competition were weak.
In August 1975, UDT attempted to remove perceived FRETILIN influence from the administration. Armed conflict followed. FRETILIN prevailed across most of the territory, while many UDT supporters crossed into Indonesian West Timor. Portugal withdrew its administration to Atauro and did not complete an agreed transfer of sovereignty.
What happened on 28 November 1975?
FRETILIN unilaterally proclaimed the Democratic Republic of East Timor on 28 November. Francisco Xavier do Amaral became president and Nicolau Lobato prime minister. The declaration is now commemorated by Timor-Leste as the proclamation of independence.
Recognition was limited and the new government controlled no secure international transition. Rival Timorese parties signed a declaration favouring integration with Indonesia under circumstances later examined critically by Timor-Leste’s truth commission.
How did Indonesia take control?
On 7 December, Indonesian forces attacked Dili by air and sea and expanded operations across the territory. Indonesian authorities represented intervention as a response to Timorese integration requests and instability. United Nations organs treated it as military intervention and continued to regard Portugal as administering power.
Security Council Resolution 384 recognised the right of the people of East Timor to self-determination, deplored Indonesian intervention and called for withdrawal. Indonesia nevertheless declared the territory its 27th province in July 1976. The UN never recognised that annexation.
What did 1975 mean for the next 24 years?
FRETILIN and FALINTIL initially held large rural areas, but Indonesian offensives, forced displacement, famine and internal conflict devastated the population. The Commission for Reception, Truth and Reconciliation later documented killings, disappearances, detention, sexual violence and deaths associated with hunger and illness.
Resistance survived in armed, clandestine and diplomatic forms. Nicolau Lobato led after internal conflict removed Amaral; Xanana Gusmão later rebuilt a broader resistance structure; José Ramos-Horta advocated internationally. The occupation ended only after the UN-organised vote of 1999 and an international transition.
Continue the chronology
Related history guides
Connected biographies
Four lives connecting declaration, resistance and international advocacy
1937—2012
Francisco Xavier do Amaral
Independence proclaimer and first presidentThe ASDT and FRETILIN founder who proclaimed independence in 1975, became the first president and later returned to electoral politics after occupation ended.Read biography
1946—1978
Nicolau Lobato
Independence leader and FALINTIL commanderA founder of the independence movement who became the 1975 republic’s first prime minister and led FALINTIL until his death in combat.Read biography
1946—
Xanana Gusmão
Resistance leader, president and prime ministerA resistance commander, political prisoner and state-builder who became Timor-Leste’s first elected president and later returned to government as prime minister.Read biography
1949—
José Ramos-Horta
Diplomat, Nobel laureate and presidentThe diplomat who carried Timor-Leste’s case through decades of exile, shared the 1996 Nobel Peace Prize and twice won the presidency.Read biographyQuick answers
Common questions
- When did Timor-Leste first declare independence?
- FRETILIN proclaimed the Democratic Republic of East Timor on 28 November 1975.
- When did Indonesia invade East Timor?
- Indonesian forces launched the principal invasion on 7 December 1975.
- Who was president in the 1975 declaration?
- Francisco Xavier do Amaral was proclaimed president, with Nicolau Lobato as prime minister.
- Did the United Nations recognise Indonesia’s annexation?
- No. UN resolutions continued to affirm East Timor’s right to self-determination and did not recognise annexation.
- Is 28 November or 20 May Timor-Leste’s independence day?
- Both dates carry distinct meaning: 28 November commemorates the 1975 proclamation, while 20 May marks the restoration of independence in 2002.
Primary and institutional sources
How this history was checked
Dates, legal milestones and historical claims are checked against the official and institutional records below. This article was reviewed on 9 September 2026.