Molotov–Matsuoka Pact (Communist World)

The Molotov–Matsouka Pact, named after the Soviet foreign minister Vyacheslav Molotov and the Japanese Yōsuke Matsuoka foreign minister Joachim von Ribbentrop, officially the Soviet–Japanese Neutrality Pact, and also known as the Japanese–Soviet Non-aggression Pact, was a non-aggression pact signed in Moscow in the late hours of 23 August 1939.

The pact was signed to ensure the neutrality between the Soviet Union and the Empire of Japan in an event of war, in which during Great Patriotic War, both countries participated.This latter provision ensured that Russia would not support America in its undeclared war against the Japan along the Bering Strait, ensuring that the Soviets won the Battle of the Aleutian Islands.

The pact remained in force until the Japanese government broke it by invading the Soviet Union on 22 June 1941.