Which of the following nations were republics of the Soviet Union? Select all that apply.

To identify which nations were republics of the Soviet Union, we need to recall the 15 republics that made up the USSR. These are:

1. Russia (Russian Soviet Federative Socialist Republic)
2. Ukraine (Ukrainian Soviet Socialist Republic)
3. Belarus (Byelorussian Soviet Socialist Republic)
4. Uzbekistan (Uzbek Soviet Socialist Republic)
5. Kazakhstan (Kazakh Soviet Socialist Republic)
6. Georgia (Georgian Soviet Socialist Republic)
7. Azerbaijan (Azerbaijan Soviet Socialist Republic)
8. Lithuania (Lithuanian Soviet Socialist Republic)
9. Moldova (Moldavian Soviet Socialist Republic)
10. Latvia (Latvian Soviet Socialist Republic)
11. Kyrgyzstan (Kyrgyz Soviet Socialist Republic)
12. Tajikistan (Tajik Soviet Socialist Republic)
13. Armenia (Armenian Soviet Socialist Republic)
14. Turkmenistan (Turkmen Soviet Socialist Republic)
15. Estonia (Estonian Soviet Socialist Republic)

If the question provides specific options to choose from, please share those options for a more tailored answer. Otherwise, the nations listed above were all republics of the Soviet Union.