for the East Timor invasion, as it was specifically designed for counter-insurgency operations in difficult terrain. By the beginning of February 1977, at least six of the 13 Broncos were operating in East Timor, and helped the Indonesian military pinpoint Fretilin positions. Along with the new weaponry, an additional 10,000 troops were sent in to begin new campaigns that would become known as the 'final solution'. The 'final solution' campaigns involved two primary tactics: The 'encirclement and annihilation' campaign involved bombing villages and mountain areas from aeroplanes, causing famine and defoliation of ground cover. When surviving villagers came down to lower-lying regions to surrender, the military would simply shoot them. Other survivors were placed in resettlement camps where they were prevented from travelling or cultivating farmland. In early 1978, the entire civilian population of Arsaibai village, near the Indonesian border, was killed for supporting Fretilin after being bombarded and starved. During this period, allegations of Indonesian use of chemical weapons arose, as villagers reported maggots appearing on crops after bombing attacks. The success of the 'encirclement and annihilation' campaign led to the 'final cleansing campaign', in which children and men from resettlement camps would be forced to hold hands and march in front of Indonesian units searching for Fretilin members. When Fretilin members were found, the members would be forced to surrender or to fire on their own people. The Indonesian 'encirclement and annihilation' campaign of 1977–1978 broke the back of the main Fretilin militia and the capable Timorese President and military commander, Nicolau Lobato, was shot and killed by helicopter-borne Indonesian troops on 31 December 1978. The 1975–1978 period, from the beginning of the invasion to the largely successful conclusion of the encirclement and annihilation campaign, proved to be the toughest period of the entire conflict, costing the Indonesians more than 1,000 fatalities out of the total of 2,000 who died during the entire occupation. FRETILIN clandestine movement (1980–1999) The Fretilin militia who survived the Indonesian offensive of the late 1970s chose Xanana Gusmão as their leader. He was caught by Indonesian intelligence near Dili in 1992 and was succeeded by Mau Honi, who was captured in 1993 and in turn, succeeded by Nino Konis Santana. Upon Santana's death in an Indonesian ambush in 1998, his successor was Taur Matan Ruak. By the 1990s, there were fewer than approximately 200 guerilla fighters remaining in the mountains (this lacks citation,