The Olympic Games is a major international multi-sport event. During its history there have been boycotts on six occasions, all of them Summer Olympics. The first boycott occurred at the 1956 Summer Olympics and the most recent was at the 1988 Summer Olympics.
Rhodesia was prevented from entering when its invitation to the 1972 Summer Olympics was withdrawn by the International Olympic Committee, following protests by other African countries. South Africa was not invited to the 1964 games, and its invitation to the 1968 games was withdrawn when numerous other teams threatened to withdraw. South Africa was not permitted to return to the Olympics until the 1992 Summer Olympics.