The Soviet Union (USSR) competed at the 1972 Summer Olympics in Munich, West Germany. 371 competitors, 298 men and 73 women, took part in 180 events in 22 sports.
The Soviet Union (USSR) competed at the 1976 Summer Olympics in the city of Montreal, Quebec, Canada. 410 competitors, 285 men and 125 women, took part in 189 events in 22 sports. As the country hosted the next Olympics in Moscow, a Soviet segment was performed at the closing ceremony.
The Soviet Union (USSR) was the host nation of the 1980 Summer Olympics in Moscow. 489 competitors, 340 men and 149 women, took part in 202 events in 23 sports.
Bulgaria competed at the 1980 Summer Olympics in Moscow, USSR. 271 competitors, 183 men and 88 women, took part in 151 events in 20 sports.
Puerto Rico competed at the 1984 Summer Olympics in Los Angeles, United States. 51 competitors, 43 men and 8 women, took part in 45 events in 13 sports.
Canada competed at the 1984 Summer Olympics in Los Angeles, United States. Canada returned to the Summer Games after having participated in the American-led boycott of the 1980 Summer Olympics. 408 competitors, 257 men and 151 women, took part in 193 events in 23 sports.
Kazakhstan competed at the 2000 Summer Olympics in Sydney, Australia. 130 competitors, 86 men and 44 women, took part in 104 events in 17 sports.
The Soviet Union (USSR) competed, for the last time before its dissolution, at the 1988 Summer Olympics in Seoul. 481 competitors, 319 men and 162 women, took part in 221 events in 27 sports. Athletes from 12 of the ex-Soviet republics would compete as the Unified Team at the 1992 Summer Olympics, and each nation would field independent teams in subsequent Games.
Canada competed at the 1988 Summer Olympics in Seoul, South Korea. 328 competitors, 223 men and 105 women, took part in 193 events in 23 sports. Most Canadians remember this the Olympics for Ben Johnson, who won the gold medal and set a world record in the men's 100 metres, before being disqualified and his record deleted after he tested positive for stanozolol.
The Unified Team at the 1992 Summer Olympics in Barcelona, Spain, was a joint team consisting of twelve of the fifteen former Soviet republics that chose to compete together. Estonia, Latvia, and Lithuania competed separately. The team has been informally called the Commonwealth of Independent States team, though Georgia was not yet a member of the CIS when it competed as part of the Unified Team. It competed under the IOC country code EUN. A total of 475 competitors, 310 men and 165 women, took part in 234 events in 27 sports.
Canada competed at the 1992 Summer Olympics in Barcelona, Spain. 295 competitors, 179 men and 116 women, took part in 199 events in 24 sports.
Bulgaria competed at the 1992 Summer Olympics in Barcelona, Spain. 138 competitors, 87 men and 51 women, took part in 116 events in 19 sports.
Cuba competed at the 1996 Summer Olympics in Atlanta, United States. 164 competitors, 111 men and 53 women, took part in 84 events in 15 sports.
Puerto Rico competed at the 1992 Summer Olympics in Barcelona, Spain.
Kyrgyzstan competed in the Summer Olympic Games as an independent nation for the first time at the 1996 Summer Olympics in Atlanta, United States. Previously, Kyrgyz athletes had competed for the Unified Team at the 1992 Summer Olympics.
Kyrgyzstan competed at the 2000 Summer Olympics in Sydney, Australia. Kyrgyzstan won their first Olympic medal at these games. 48 competitors, 35 men and 13 women, took part in 59 events in 9 sports.
Uzbekistan competed in the Summer Olympic Games as an independent nation for the first time at the 1996 Summer Olympics in Atlanta, United States. Previously, Uzbek athletes competed for the Unified Team at the 1992 Summer Olympics. 71 competitors, 63 men and 8 women, took part in 70 events in 12 sports.
Nigeria competed at the 1984 Summer Olympics in Los Angeles, United States.
Yugoslavia competed at the 1984 Summer Olympics in Los Angeles, United States which took place from 29 July to 12 August 1984. Yugoslav athletes had competed in every Summer Olympic Games since their official debut in 1920. The Yugoslav Olympic Committee (JOK) sent a delegation of 139 athletes, 105 men and 34 women, competing in 16 sports, down from 164 competitors in 1980. Due to the Soviet-led boycott, Yugoslavia was one of only three Communist countries to take part at the Games, along with China and Romania.
Athletes from the Socialist Federal Republic of Yugoslavia competed at the 1988 Summer Olympics in Seoul, South Korea. This was the last time that the SFR Yugoslavia competed in the Summer Olympics. 155 competitors, 117 men and 38 women, took part in 72 events in 18 sports.
