Wikipedia - USSR

https://en.wikipedia.org/wiki/Eurasian_Economic_Union

"When the USSR began to fall in 1991, the presidents of Belarus, Kazakhstan and Russia of the founding republics signed the Belavezha Accords on 8 December 1991, declaring that the Soviet Union would cease to exist and proclaimed the Commonwealth of Independent States in its place."

https://en.wikipedia.org/w/index.php?title=Eurasian_Economic_Union&oldid=1215336828

https://en.wikipedia.org/wiki/Belovezha_Accords Effective:

• Belarus Ukraine 10 December 1991
• Russia 12 December 1991
• Kazakhstan 23 December 1991
• Tajikistan 25 December 1991
• Armenia Turkmenistan 26 December 1991
• Uzbekistan 4 January 1992
• Kyrgyzstan 6 March 1992
• Azerbaijan 24 September 1993
• Georgia 3 December 1993
• Moldova 8 April 1994