War in 1990, many young Tutsi men in Kivu crossed the border to join the Tutsi-dominated rebel Rwandan Patriotic Front (RPF) in its fight against the Hutu-dominated Rwandan government. In response, the Mobutu government implemented Mission d'Identification de Zaïrois au Kivu to identify non-Zairean Banyarwanda, using the end of the Berlin Conference as the division point. Many Banyarwanda whose families had come as colonial labourers were classified as aliens, resulting in yet more youth joining the RPF. The overall effect of the CNS was to strengthen the tendency of "indigenous" Congolese to differentiate Tutsi from Hutu, and lump together all Tutsi Banyarwanda as "Banyamulenge". It also underlined the fragility of their political position to the Banyamulenge. Within the Banyarwanda in the Kivus, the Hutu began defining themselves as "indigenous" in comparison to the Tutsis, who were increasingly seen as owing their allegiance to the foreign groups. Conflict (1993–1998) In 1993, the issue of land and indigenous claims in the Kivus erupted into bloody conflict. Hutu, and some Tutsi, landlords began buying the lands of poor Hutu and Bahunde of the Wanyanga chiefdom in Masisi, North Kivu. After being displaced, one thousand people went to Walikale, demanding the right to elect their own ethnic leaders. The Banyanga, insisting that only "indigenous people" could claim this customary right, began fighting with the Hutu. The one thousand returned to Masisi, where the Hutu landlords, and Banyarwanda in general, supported the claim of Banyarwanda to "indigenous" rights. The government sent in the Division Spéciale Présidentielle (DSP) and Guard Civile to restore order. Ill-supplied, the security forces were forced to live off the local population: the DSP off the rich Hutu and the Guard Civile off the Bahunde and ordinary Hutu. The DSP appeared to be protecting the rights of the "non-indigenous" (primarily Hutu) against the "indigenous" (primarily Bahunde), sparking outrage and increasing the scope of the conflict. One estimate is that between 10,000 and 20,000 people were killed; another 200,000 people were forced to flee their homes. In late 1993, about 50,000 Burundian refugees from the Burundi Civil War began streaming into primarily South Kivu. They were followed the next year by almost one million mostly Hutu refugees from the Rwandan genocide, creating the Great Lakes refugee crisis. The Hutu government responsible for the genocide came with the refugees; they turned the camps into armed bases from which they could launch attacks against the