1938 in the Soviet Union

Soviet campaign of political repression, imprisonment, and execution (August 1936 - March 1938)

1938 Soviet–Japanese border conflict

series of three trials held in the Soviet Union at the instigation of Joseph Stalin between 1936 and 1938 against so-called Trotskyists and members of Right Opposition of the Communist Party of the Soviet Union

1938 trial during the Soviet Great Purge

1937-38 Soviet ethnic cleansing of Poles, forced evacuations to Siberia and Gulags

Soviet airship

ethnic cleansing in the Soviet Union

the period before the outbreak of the Winter War between Finland and the Soviet Union (1939–1940), which stretches from the Finnish Declaration of Independence in 1917 to the Soviet-Finnish negotiations in 1938–1939

repressions of physicists in the Soviet Union

Mass arrests and executions of Latvians in the USSR, 1937-38