Idi Amin make Uganda an ally of the Soviet Union. Amin, who had served with the King's African Rifles and taken part in Britain's suppression of the Mau Mau uprising prior to Ugandan independence, was known by the British as "intensely loyal to Britain". This made him an obvious choice as Obote's successor. Although some have claimed that Amin was being groomed for power as early as 1966, the plotting by the British and other Western powers began in earnest in 1969, after Obote had begun his nationalisation programme. Following the expulsion of Ugandan Asians in 1972, most of whom were of
Idi Amin Wilson Oryema and Charles Oboth Ofumbi. Amin recruited his followers from his own ethnic group, the Kakwas, along with South Sudanese. By 1977, these three groups formed 60 percent of the 22 top generals and 75 percent of the cabinet. Similarly, Muslims formed 80 percent and 87.5 percent of these groups even though they were only 5 percent of the population. This helps explain why Amin survived eight attempted coups. The army grew from 10,000 to 25,000 by 1978. Amin's army was largely a mercenary force. Half the soldiers were South Sudanese and 26 percent Congolese, with only 24 percent