<Li> Occupation of the Baltic states by the USSR followed by their annexation: <Ul> <Li> August 3, 1940--Lithuanian SSR was incorporated into the USSR . </Li> <Li> August 5, 1940--Latvian SSR was incorporated into the USSR . </Li> <Li> August 6, 1940--Estonian SSR was incorporated into the USSR . </Li> </Ul> </Li> <Ul> <Li> August 3, 1940--Lithuanian SSR was incorporated into the USSR . </Li> <Li> August 5, 1940--Latvian SSR was incorporated into the USSR . </Li> <Li> August 6, 1940--Estonian SSR was incorporated into the USSR . </Li> </Ul> <Li> August 3, 1940--Lithuanian SSR was incorporated into the USSR . </Li> <Li> August 5, 1940--Latvian SSR was incorporated into the USSR . </Li>

1922 treaty on the creation of the soviet union