https://en.wikipedia.org/wiki/Military_occupations_by_the_Soviet_Union
1 Poland (1939–1956)
2 Baltic states (1940–1991)
3 Finnish territories (1940)
4 Bessarabia and Northern Bukovina (1940)
5 After the Soviet Union entered the war on the Allied side
5.1 Iran (1941–1946)
5.2 Hungary (1944)
5.3 Romania (1944)
5.4 Bulgaria (1944)
5.5 Czechoslovakia (1944)
5.6 Northern Norway (1944–1946) and Bornholm, Denmark (1945–1946)
5.7 Germany (1945)
5.8 Austria (1945–1955)
5.9 Manchuria (1945–1946)
5.10 Korea (1945–1948)
5.11 Kuril Islands (1945)
6 Cold War
6.1 Hungarian Revolution of 1956
6.2 Czechoslovakia (1968–1989)
6.3 Afghanistan (1979–1989)