Only two cities bid for the 1980 Summer Olympic Games: Los Angeles and Moscow. Moscow won; Los Angeles went on to host the 1984 Games.
After the 1979 invasion of Afghanistan, the USA led a boycott of the Moscow Games and were joined by 60 other countries including West Germany, Canada, China and Japan. Athletes from Great Britain and France competed under the Olympic flag rather than their own. The University of Pennsylvania hosted an alternative Olympic Boycott Games attended by 29 countries.
The USSR retaliated by leading an Eastern Bloc boycott of the 1984 Games in Los Angeles.