was this place occupied by a foreign force?
Yes - by Portugal and Indonesia
East Timor
East Timor was colonised by Portugal in the 16th century and was known as Portuguese Timor until 28 November 1975, when the Revolutionary Front for an Independent East Timor (Fretilin) declared the territory's independence. Nine days later, it was invaded and occupied by the Indonesian military; it was declared Indonesia's 27th province the following year. The Indonesian occupation of East Timor was characterised by a highly violent, decades-long conflict between separatist groups (especially Fretilin) and the Indonesian military.
what is the timor leste defence force? A military body responsible for the defence of East Timor. when was it formed? February 2001 by whom? From the national liberation movement guerrilla army known as FALINTIL why was it formed? Before 1999 some East Timorese leaders,  proposed that a future East Timorese state would not have a military. The widespread violence and destruction that followed the independence referendum in 1999 and the need to provide employment to FALINTIL veterans led to a change in policy. what is the full form of the national liberation movement guerrilla army that you mentioned? Forças Armadas de Libertação de Timor-Leste what are its different ranks? Similar to the Portuguese Armed Forces. Example -officers, sergeants how many members does it comprise of? UNANSWERABLE who is the leader? Major General Lere Anan Timur what is its role? To protect East Timor against external attack, supporting the suppression of civil disorder, responding to humanitarian crises and facilitating co-operation between different parts of the government. where exactly is the place you mentioned at the start? An island country in Southeast Asia.
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East Timor [SEP] Introduction
Nine days later, it was invaded and occupied by the Indonesian military; it was declared Indonesia's 27th province the following year. The Indonesian occupation of East Timor was characterised by a highly violent, decades-long conflict between separatist groups (especially Fretilin) and the Indonesian military. In 1999, following the United Nations-sponsored act of self-determination, Indonesia relinquished control of the territory. As "Timor-Leste", it became the first new sovereign state of the 21st century on 20 May 2002 and joined the United Nations and the Community of Portuguese Language Countries. In 2011, East Timor announced its intention to become the eleventh member of the Association of Southeast Asian Nations (ASEAN).