The Indonesian occupation of East Timor began in December 1975 and lasted until October 1999. After centuries of Portuguese colonial rule in East Timor, the 1974 Carnation Revolution in Portugal led to the decolonisation of its former colonies, creating instability in East Timor and leaving its future uncertain. After a small-scale civil war, the pro-independence Fretilin declared victory in the capital city of Dili and declared an independent East Timor on 28 November 1975.
Following the "Balibo Declaration" that was signed by representatives of Apodeti, UDT, KOTA and the Trabalhista Party on 30 November 1975, Indonesian military forces invaded East Timor on 7 December 1975, and by 1979 they had all but destroyed the armed resistance to the occupation. On 17 July 1976, Indonesia formally annexed East Timor as its 27th province and declared the province of Timor Timur (East Timor).