• Central and Eastern Europe
• CMEA countries

• Armenian SSR
• Azerbaijan SSR
• Byelorussian SSR
• Estonian SSR
• Georgian SSR
• Kazakh SSR
• Kirghiz SSR
• Latvian SSR
• Lithuanian SSR
• Moldavian SSR
• Russian SFSR
• Tajik SSR
• Turkmen SSR
• Ukrainian SSR
• Uzbek SSR

• CIS countries
• Russia

• Soviet Union

• Use for events between 1922 and 1991.

• Countries and country groupings > Europe

http://vocabularies.unesco.org/thesaurus/concept927