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
Mohammad-Amin Riahi classical Persian texts such as "Mersad-al-ebad" and "Nozhat-al-majalis". During a course of 60 years he published numerous scholarly articles, a selection of which are gathered in a volume titled "Forty essays on language, literature and history of Iran". Among numerous cultural positions he held during his career, Riahi was a professor of Tehran University, the founding member and later president of the Shahnameh Foundation (1971–1979), vice-chairman of the Iranian Academy of Literature and Arts, and Iranian Minister of Education (1979). "Critical Editions of old Persian books:" "Literary and Historical research books:" "Some of Encyclopedic Articles:" Mohammad-Amin Riahi Mohammad-Amin Riahi (;