Rwandan Civil War
In 1990 he joined the Rwandan Patriotic Front (RPF) after his brother, a colonel in the Rwandan Armed Forces, was murdered. At the time, the RPF was just beginning its invasion of Rwanda from Uganda, starting the Rwandan Civil War. Bizimungu lived in exile in Belgium, serving as the party's information officer. In 1993, he helped negotiate the 1993 Arusha Accords.