Idi Amin Soviet Union became Amin's largest arms supplier. East Germany was involved in the General Service Unit and the State Research Bureau, the two agencies that were most notorious for terror. Later during the Ugandan invasion of Tanzania in 1979, East Germany attempted to remove evidence of its involvement with these agencies. In 1973, U.S. Ambassador Thomas Patrick Melady recommended that the United States reduce its presence in Uganda. Melady described Amin's regime as "racist, erratic and unpredictable, brutal, inept, bellicose, irrational, ridiculous, and militaristic". Accordingly, the United States closed its embassy in Kampala. In June 1976, Amin allowed an Air
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 (;