Lithuania incorporated into the Soviet Union

The League condemned the Soviet invasion of Finland and expelled the USSR. The decision exposed the weakness of collective security and the limits of Soviet claims to defend peace through...

Soviet forces entered Estonia and Latvia after ultimatums and entered Lithuania under a similar demand. The occupation followed the 1939 mutual-assistance pacts; subsequent controlled political...

Following a Soviet ultimatum, Romania withdrew and Soviet troops entered Bessarabia and Northern Bukovina. The move expanded Soviet control and affected Romanian, Ukrainian, Jewish, Russian, and other...

Newly installed assemblies adopted resolutions seeking incorporation. These votes followed Soviet military occupation and political coercion; the Soviet and Baltic accounts of the process remain...

The USSR created the Moldavian SSR from most of Bessarabia and the Moldavian Autonomous SSR, while northern Bukovina and parts of Bessarabia were attached to the Ukrainian SSR. The new borders divided...

The USSR formally incorporated Latvia following occupation and a staged political process. The change brought Soviet nationalization, political arrests, and institutional restructuring, while...

The USSR formally incorporated Estonia after occupation and controlled elections. The annexation ended Estonian independence and initiated Soviet restructuring, repression, and nationalization.

Germany launched Operation Barbarossa, opening a war of annihilation across Soviet territory. Occupation, mass shootings, starvation, forced labor, and the Holocaust devastated civilians; Soviet...

Vyacheslav Molotov’s broadcast informed Soviet listeners of the invasion and called for resistance. The statement framed the war as defense of the homeland and set out the state’s public response to a...

The emergency committee concentrated wartime authority in a small body led by Stalin. It coordinated military, industrial, and civilian mobilization, placing the Union’s republics and populations...