History of the Democratic Republic of the Congo war and genocide in neighboring Rwanda had spilled over into Zaire. Rwandan Hutu militia forces (Interahamwe) who had fled Rwanda following the ascension of a Tutsi-led government had been using Hutu refugee camps in eastern Zaire as bases for incursions into Rwanda. In October 1996 Rwandan forces attacked refugee camps in the Rusizi River plain near the intersection of the Congolese, Rwandan and Burundi borders meet, scattering refugees. They took Uvira, then Bukavu, Goma and Mugunga. Hutu militia forces soon allied with the Zairian armed forces (FAZ) to launch a campaign against Congolese ethnic Tutsis in eastern Zaire. In turn,
Ethnic groups in Burundi declared a presidential republic; however peace did not ensue as a result. Even after 1966, the subsequent dictatorial regimes of Michel Micombero (1966–76), Jean-Baptiste Bagaza (1976–87), and Pierre Buyoya (1987–93) were dominated by Tutsi elites which often consciously marginalized and discriminated against the Hutu majority. The first Hutu to become head of state was Melchior Ndadaye in 1993, although he was assassinated shortly after taking power. Ethnic violence peaked in 1972 when 100,000 people, mainly Hutu, were killed by the Tutsi regime in the Burundian Genocide. Twa have also been targeted, specifically in violence directed against the Tutsi with whom