Idi Amin of Amin's ministers defected or fled into exile. In November 1978, after Amin's vice president, General Mustafa Adrisi, was injured in a car crash, troops loyal to him mutinied. Amin sent troops against the mutineers, some of whom had fled across the Tanzanian border. Amin accused Tanzanian President Julius Nyerere of waging war against Uganda, ordered the invasion of Tanzanian territory, and formally annexed a section of the Kagera Region across the boundary. In January 1979, Nyerere mobilised the Tanzania People's Defence Force and counterattacked, joined by several groups of Ugandan exiles who had united as the Uganda National Liberation
Idi Amin forward, although one officer said of him: "Idi Amin is a splendid type and a good (rugby) player, but virtually bone from the neck up, and needs things explained in words of one letter". In the 1950s, he played for Nile RFC. There is a frequently repeated urban myth that he was selected as a replacement by the East Africa rugby union team for their 1955 match against the British Lions. Amin, however, does not appear in the team photograph or on the official team list. Following conversations with a colleague in the British Army, Amin became a keen fan