A nine-year secessionist revolt on the island of Bougainville claimed some 20,000 lives. The rebellion began in early 1989, active hostilities ended with a truce in October 1997 and a permanent ceasefire was signed in April 1998. A peace agreement between the Government and ex-combatants was signed in August 2001. A regional peace-monitoring force and a UN observer mission monitors the government and provincial leaders who have established an interim administration and are working toward complete surrender of weapons, the election of a provincial government and an eventual referendum on independence.