Rwandan genocide training to the Banyamulenge, a Tutsi group in the Zairian South Kivu province, helping them to defeat Zairian security forces. Rwandan forces, the Banyamulenge, and other Zairian Tutsi, then attacked the refugee camps, targeting the Hutu militia. These attacks caused hundreds of thousands of refugees to flee; many returned to Rwanda despite the presence of the RPF, while others ventured further west into Zaire. The defeated forces of the former regime continued a cross-border insurgency campaign, supported initially by the predominantly Hutu population of Rwanda's northwestern provinces. By 1999, a programme of propaganda and Hutu integration into the national army,
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