Answer
Pierre Nkurunziza was the leader of the CNDD–FDD, which is a political party in Burundi. The CNDD–FDD was founded in 1994 as the military wing of the Burundian rebel group, the CNDD. The CNDD–FDD fought in the Burundian Civil War, which lasted from 1993 to 2005. The CNDD–FDD was the victorious party in the war, and Nkurunziza became the President of Burundi in 2005.