The Intercosmos program was a program by the Soviet Union to make the fellow Socialist nations participate in space exploration. Most notable were the manned space flight missions, but also unmanned satellites were part of the program.

Date	Prime cosmonaut	Backup cosmonaut	Nation	Mission
February 3, 1978	Vladimír Remek	Oldrich Pelcak	Czechoslovakia	Soyuz 28
June 27, 1978	Miroslaw Hermaszewski	Zenon Jankowski	Poland	Soyuz 30
August 26, 1978	Sigmund Jähn	Eberhard Köllner	East Germany	Soyuz 31
April 10, 1979	Georgi Ivanov	Aleksandr P. Aleksandrov	Bulgaria	Soyuz 33
May 26, 1980	Bertalan Farkas	Bela Magyari	Hungary	Soyuz 36
July 23, 1980	Tuân Pham	Thanh Liem Bui	Vietnam	Soyuz 37
September 18, 1980	Arnaldo Tamayo Méndez	Jose Lopez Falcon	Cuba	Soyuz 38
March 23, 1981	Zhugderdemidiyn Gurragcha	Maidarzhavyn Ganzorig	Mongolia	Soyuz 39
May 14, 1981	Dumitru Prunariu	Dumitru Dediu	Romania	Soyuz 40

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