the African Union Mission had reached full strength: 1,483 South Africans, 820 Ethiopians, and 232 personnel from Mozambique. As the Arusha Accords were implemented, the peace process made substantial progress. The reform of the military proved remarkably successful, and the integration of CNDD-FDD fighters went well. In contrast to earlier attempts to ensure peace which had been sabotaged by army extremists, most of the military had become wary of the constant civil war by the early 2000s. Its Tutsi and Hutu troops proved to be willing to stay loyal to the new government. The United Nations Operation in Burundi also helped to stabilize the country. In spite of these successes, the war had not yet ended. The FNL remained the only active rebel group, but it was still a capable fighting force and continued its attacks. In July 2003, a rebel raid on Bujumbura left 300 dead and 15,000 displaced. On December 29, 2003, Archbishop Michael Courtney, the papal nuncio for the country, was murdered. Confronted by the newly unified Burundian military and the international peacekeepers, as well as a war-wary population, the abilities of the FNL to wage an insurgency gradually whittled down. By late 2004, it had just about 1,000 fighters left, and its area of operations had been reduced to just Bujumbura Rural Province. In August 2004, the FNL claimed responsibility for killing 160 Congolese Tutsi refugees in a United Nations camp at Gatumba near the Congo border in Burundi. The attack was strongly condemned by the U.N. Security Council, which issued a statement of outrage at the fact that "most of the victims were women, children and babies who were shot dead and burned in their shelters. The FNL attempted to deflect criticism by claiming that the victims had been Banyamulenge militants, but the Gatumba massacre proved to be a propaganda disaster. The group was consequently labelled as "terrorist" both internationally and in Burundi, weakening it politically. Confronted with its declining fortunes, the FNL signalled that it was willing to negotiate an end of its insurgency. Final peace process In 2005, many developments were made in the peace process. The president signed a law in January 2005 to initiate a new national army, consisting of Tutsi military forces and all but one of the Hutu rebel groups. The Constitution was approved by voters in a referendum—marking the first time Burundians had voted since 1994. They voted