Soviet Union

The Soviet Union (officially the Union of Soviet Socialist Republics, or USSR) was a Eurasian sovereign state that existed from 1922 to 1991; it collapsed after a series of reforms, and the constituent nations each declared independence. Russia is officially treated as the successor state to the Soviet Union, and took its place at the United Nations, including the United Nations Security Council.

Members of the Soviet Union

 * Armenian Soviet Socialist Republic Armenian Soviet Socialist Republic
 * Azerbaijan Soviet Socialist Republic Azerbaijan Soviet Socialist Republic
 * Byelorussian Soviet Socialist Republic Byelorussian Soviet Socialist Republic
 * Estonian Soviet Socialist Republic Estonian Soviet Socialist Republic
 * Georgian Soviet Socialist Republic Georgian Soviet Socialist Republic
 * Kazakh Soviet Socialist Republic Kazakh Soviet Socialist Republic
 * Kirghiz Soviet Socialist Republic Kirghiz Soviet Socialist Republic
 * Latvian Soviet Socialist Republic Latvian Soviet Socialist Republic
 * Lithuanian Soviet Socialist Republic Lithuanian Soviet Socialist Republic
 * Moldavian Soviet Socialist Republic Moldavian Soviet Socialist Republic
 * Russian Soviet Federative Socialist Republic Russian Soviet Federative Socialist Republic
 * Tajik Soviet Socialist Republic Tajik Soviet Socialist Republic
 * Turkmen Soviet Socialist Republic Turkmen Soviet Socialist Republic
 * Ukrainian Soviet Socialist Republic Ukrainian Soviet Socialist Republic
 * Uzbek Soviet Socialist Republic Uzbek Soviet Socialist Republic

Independent nations of post-collapse Soviet Union

 * 🇦🇲 Armenia Armenia
 * 🇦🇿 Azerbaijan Azerbaijan
 * 🇧🇾 Belarus Belarus
 * 🇪🇪 Estonia Estonia
 * Georgia Georgia
 * 🇰🇿 Kazakhstan Kazakhstan
 * 🇰🇬 Kyrgyzstan Kyrgyzstan
 * 🇱🇻 Latvia Latvia
 * 🇱🇹 Lithuania Lithuania
 * 🇲🇩 Moldova Moldova
 * 🇷🇺 Russia Russia
 * 🇹🇯 Tajikistan Tajikistan
 * 🇹🇲 Turkmenistan Turkmenistan
 * 🇺🇦 Ukraine Ukraine
 * 🇺🇿 Uzbekistan Uzbekistan