Complex sentence: During the 1970s, Fidel Castro dispatched tens of thousands of troops in support of Soviet-supported wars in Africa, particularly the MPLA in Angola and Mengistu Haile Mariam in Ethiopia.
Split into simpler sentences: During the 1970s, Fidel Castro dispatched tens of thousands of troops in support of Soviet-supported wars in Africa. He supported the MPLA in Angola and Mengistu Haile Mariam in Ethiopia.