Many exiled refugee Rwandan Tutsis in Uganda had joined the rebel forces of Yoweri Kaguta Museveni in the Ugandan Bush War and had then become part of the Ugandan military upon the rebel victory in 1986. Among these were Fred Rwigyema and Paul Kagame, who rose to prominence in the Rwandan Patriotic Front (RPF), a Rwandan rebel group largely consisting of Tutsi veterans of the Ugandan war. On October 1, 1990, the RPF invaded Rwanda from their base in neighboring Uganda. The rebel force, composed primarily of ethnic Tutsis, blamed the government for failing to democratize and resolve the problems of some 500,000 Tutsi refugees living in diaspora around the world.