 Amin was overthrown in 1979 following the Uganda-Tanzania War, but his loyalists started the Bush War by launching an insurgency in the West Nile region in 1980.Subsequent elections saw Obote return to power in an UNLA-ruled government.Several opposition groups claimed the elections were rigged, and united as the NRA under the leadership of Yoweri Museveni to start an armed uprising against Obote's government on 6 February 1981.