Once in power, Amin began mass executions upon the Acholi and Lango, Christian tribes that had been loyal to Obote and therefore perceived as a threat. He also began terrorizing the general public through the various internal security forces he organized, such as the State Research Bureau (SRB) and Public Safety Unity (PSU), whose main purpose was to eliminate those who opposed his regime.
In 1972, Amin expelled Uganda’s Asian population, which numbered between 50,000 and 70,000, resulting in a collapse of the economy as manufacturing, agriculture and commerce came to a screeching halt without the appropriate resources to support them.
When the Popular Front for the Liberation of Palestine (PFLP) hijacked an Air France flight from Israel to Paris on June 27, 1976, Idi Amin welcomed the terrorists and supplied them with troops and weapons, but was humiliated when Israeli commandos subsequently rescued the hostages in a surprise raid on the Entebbe airport. In the aftermath, Amin ordered the execution of several airport personnel, hundreds of Kenyans whom were believed to have conspired with Israel and an elderly British hostage who had previously been escorted to a nearby hospital.
Throughout his oppressive rule, Amin was estimated to have been responsible for the deaths of roughly 300,000 civilians.