New Baltic assemblies vote to seek incorporation into the USSR

The Soviet government accused Finland of shelling Soviet positions and used the incident to intensify the crisis. Finland denied responsibility; the event became a pretext for terminating the...

Soviet forces crossed into Finland after negotiations over border security and territorial concessions failed. The invasion was an act of aggression that produced heavy civilian and military losses...

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...

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 Lithuania after its occupation and a controlled political process. Soviet institutions and land, economic, and security policies were imposed amid resistance,...

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...