power-sharing government would be established, with the presidents holding office for three-year terms. The second objective involved a restructuring of the armed forces, where the two groups would be represented equally. As the protracted nature of the peace talks demonstrated, the mediators and negotiating parties confronted several obstacles. First, the Burundian officials perceived the goals as "unrealistic" and viewed the treaty as ambiguous, contradictory and confusing. Second, and perhaps most importantly, the Burundians believed the treaty would be irrelevant without an accompanying cease fire. This would require separate and direct talks with the rebel groups. The main Hutu party was skeptical of the offer of a power-sharing government; they alleged that they had been deceived by the Tutsi in past agreements. In 2000, the Burundian President signed the treaty, as well as 13 of the 19 warring Hutu and Tutsi factions. Disagreements persisted over which group would preside over the nascent government, and when the ceasefire would begin. The spoilers of the peace talks were the hardliner Tutsi and Hutu groups who refused to sign the accord; as a result, violence intensified. Three years later at a summit of African leaders in Tanzania, the Burundian president and the main opposition Hutu group signed an accord to end the conflict; the signatory members were granted ministerial posts within the government. However, smaller militant Hutu groups – such as the Forces for National Liberation – remained active. UN involvement Between 1993 and 2003, many rounds of peace talks, overseen by regional leaders in Tanzania, South Africa and Uganda, gradually established power-sharing agreements to satisfy the majority of the contending groups. Initially the South African Protection Support Detachment was deployed to protect Burundian leaders returning from exile. These forces became part of the African Union Mission to Burundi, deployed to help oversee the installation of a transitional government. In June 2004, the UN stepped in and took over peacekeeping responsibilities as a signal of growing international support for the already markedly advanced peace process in Burundi. The mission's mandate, under Chapter VII of the United Nations Charter, has been to monitor cease-fire, carry out disarmament, demobilisation and reintegration of former military personnel, support humanitarian assistance and refugee and IDP return, assist with elections, protect international staff and Burundian civilians, monitor Burundi's troublesome borders, including halting illicit arms flows, and assist in carrying out institutional reforms including those of the Constitution, judiciary, armed forces