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,
Rwandan genocide or simply having a "Tutsi appearance". The RPF was making slow but steady gains in the north and east of the country, ending the killings in each area occupied. The genocide was effectively ended during April in areas of Ruhengeri, Byumba, Kibungo and Kigali provinces. The killings ceased during April in the "akazu" heartlands of western Ruhengeri and Gisenyi, as almost every Tutsi had been eliminated. Large numbers of Hutu in the RPF conquered areas fled, fearing retribution for the genocide; 500,000 Kibungo residents walked over the bridge at Rusumo Falls, into Tanzania, in a few days at the end