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
History of Uganda (1971–79) which Obote had attempted to dismantle. They seemed willing to forget that their new president, Idi Amin, had been the tool of that military suppression. Amin made the usual statements about his government's intent to play a mere "caretaker role" until the country could recover sufficiently for civilian rule. Amin repudiated Obote's non-aligned foreign policy, and his government was quickly recognized by Israel, Britain, and the United States. By contrast, presidents Julius Nyerere of Tanzania, Kenneth Kaunda of Zambia, Jomo Kenyatta of Kenya, and the Organization of African Unity (OAU) initially refused to accept the legitimacy of the new military