ButtPlug,
That was during WW2. However, as stated, I was talking about statues, not the death count.
Germany
Stalin did not invade or occupy Germany under his rule; the USSR was invaded by Nazi Germany in June 1941 (Operation Barbarossa). The Soviet occupation of eastern Germany occurred only after 1944-45 victories.
Iran
Soviet forces occupied northern Iran in August 1941 alongside British troops in the Anglo-Soviet invasion to secure supply routes and counter German influence. Stalin oversaw this but it was not a unilateral action [ indirectly via context].
Romania
Stalin pressured Romania to cede Bessarabia and Northern Bukovina in June 1940 via ultimatum, leading to Soviet occupation of these eastern territories (later forming the Moldavian SSR). No full-country invasion occurred.
Poland
The Soviet Union under Stalin invaded eastern Poland on September 17, 1939, following the Molotov-Ribbentrop Pact with Nazi Germany, which had invaded from the west two weeks earlier. This led to the partition and annexation of Poland by the two powers, with Soviet forces occupying the eastern territories until 1941.
Finland
Stalin ordered the invasion of Finland on November 30, 1939, sparking the Winter War, after Finland rejected Soviet territorial demands. The Red Army occupied parts of Finland until the Moscow Peace Treaty in March 1940 ceded territories like the Karelian Isthmus.
Estonia
Soviet forces occupied Estonia in June 1940, following ultimatums and the Molotov-Ribbentrop Pact's secret protocols. Estonia was annexed into the USSR as the Estonian SSR shortly after.
Latvia
On June 17, 1940, Soviet troops invaded and occupied Latvia, seizing key infrastructure amid threats of bombing. Like Estonia, it was annexed as the Latvian SSR by August 1940.
Lithuania
The USSR occupied Lithuania in June 1940 through similar ultimatums and military bases established in 1939. It was annexed as the Lithuanian SSR, completing the Baltic states' takeover.