The Soviet leadership halts mass arrest operations

The new constitution promised universal suffrage, social rights, and formal equality among Soviet nationalities. At the same time, political competition was suppressed and mass arrests were...

A closed proceeding convicted Mikhail Tukhachevsky and other senior officers of treason; they were executed the next day. The military purge removed experienced commanders on the eve of war and spread...

The order targeted former kulaks, alleged criminals, and other designated “anti-Soviet elements,” assigning regional arrest and punishment limits. Quotas and secret procedures helped produce mass...

Order 00485 initiated mass arrests targeting people accused of Polish espionage. The operation was part of the Great Terror’s national operations, which punished people collectively on the basis of...

Nikolai Bukharin and other defendants were convicted after a public trial marked by coerced confessions and sweeping conspiracy claims. The purges devastated the party, state institutions, military...

Stalin’s report at the congress celebrated the Soviet Union’s industrial and military development while presenting international rivalry as a long-term threat. The gathering followed the peak of the...

The public non-aggression treaty included secret protocols dividing spheres of influence in Eastern Europe. It gave both governments room to pursue expansion and exposed smaller states to decisions...

After Germany invaded Poland, Soviet forces crossed the eastern border under the pact’s secret arrangements. Polish territory was divided between two occupying powers; residents faced arrests,...

Soviet forces crossed the Finnish border after failed negotiations over security near Leningrad. The war exposed the costs of Stalin’s coercive diplomacy and the Red Army’s weaknesses after the...

The Soviet Politburo approved a proposal to execute thousands of Polish officers and prisoners held by the NKVD. The killings at Katyn and other sites were part of a broader effort to eliminate Polish...