When was the Commonwealth of Independent States formed?
Commonwealth of Independent States
8 December 1991
The CIS has its origins in the Soviet Union (USSR), which was established by the 1922 Treaty and Declaration of the Creation of the USSR by the Russian SFSR, Byelorussian SSR and Ukrainian SSR.  When the USSR began to fall in 1991, the founding republics signed the Belavezha Accords on 8 December 1991, declaring the Soviet Union would cease to exist and proclaimed the CIS in its place.  A few days later the Alma-Ata Protocol was signed, which declared that Soviet Union was dissolved and that the Russian Federation was to be its successor state.  The Baltic states (Estonia, Latvia and Lithuania), which regard their membership in the Soviet Union as an illegal occupation, chose not to participate. Georgia withdrew its membership in 2008. Ukraine, which participated as an associate member, ended its participation in CIS statutory bodies on 19 May 2018.[3]