Soviet–Polish Non-Aggression Pact

The Soviet–Polish Non-Aggression Pact (Polish: Polsko-radziecki pakt o nieagresji, Russian: Договор о ненападении между СССР и Польшей, transliterated as Dogovor o nenapadenii mezhdu SSSR i Pol'shey) was a non-aggression pact signed in 1932 by representatives of Poland and the Soviet Union. The pact was unilaterally broken on September 17, 1939, by the Soviet invasion of Poland.