Emperor Haile Selassie ruled Ethiopia from 1892 to 1975. He led a successful revolution in 1916 against Lij Yasu; nevertheless, when the Italians invaded in 1936, the Ethiopian Army was easily overrun, and Selassie fled. The British recapture of Ethiopia in 1942 paved the way for Selassie's return to the throne. After regaining power, Selassie implemented extensive reforms and modernization. In 1963, he helped found the Organization of African Unity, which established its headquarter's in the Ethiopian capital of Addis Ababa. In 1974, Selassie was overthrown by leftist army officers. He was later killed on the orders of Colonel Mengistu Haile Mariam of the "Derg" Marxist government. Bibliography: Kapuseinski, Ryszard. The Emperor : Downfall of an Autocrat. 1983. San Diego : Harcourt, Brace, Jovanovich. Mockler, Anthony. Haile Selassie's War: the Italian - Ethiopian Campaign 1935- 1941. 1984. New York: Random House.