[1] On 7 December 1975, when Indonesia invaded and occupied East Timor, Taur Matan Ruak took to the hills with the recently formed FRETILIN Army, FALINTIL.As a combatant, he participated in battles against the Indonesian military in Dili, Aileu, Maubisse, Ossu, Venilale, Uatulari and finally in Laga on the northeastern coast, where he eventually stayed.During a mission to locate survivors of the annihilation campaign, Taur Matan Ruak was captured in the Viqueque area by Indonesian Army forces on 31 March 1979.Taur Matan Ruak was promoted and made responsible for strategic planning of commando operations in the Eastern sector in March 1983.[citation needed] A presidential election was held in East Timor on 17 March and 16 April 2012[7] to choose a president for a five-year term.[citation needed] Taur Matan Ruak was sworn in as president on 20 May 2012, on the same day that East Timor marked the tenth anniversary of its independence.