Idi Amin Kampala suburb of Nakasero became the scene of torture and executions over the next few years. Other agencies used to persecute dissenters included the military police and the Public Safety Unit (PSU). Obote took refuge in Tanzania, having been offered sanctuary there by the Tanzanian President Julius Nyerere. Obote was soon joined by 20,000 Ugandan refugees fleeing Amin. The exiles attempted but failed to regain Uganda in 1972, through a poorly organised coup attempt. Amin retaliated against the attempted invasion by Ugandan exiles in 1972, by purging the army of Obote supporters, predominantly those from the Acholi and Lango ethnic
Idi Amin estimated by international observers and human rights groups to range from 100,000 to 500,000. Amin did not write an autobiography, and he did not authorize an official written account of his life. There are, therefore, discrepancies regarding when and where he was born. Most biographical sources claim that he was born in either Koboko or Kampala around 1925. Other unconfirmed sources state Amin's year of birth from as early as 1923 to as late as 1928. Amin's son Hussein has stated that his father was born in Kampala in 1928. According to Fred Guweddeko, a researcher at Makerere University, Amin