The Soviet–Japanese Neutrality Pact (日ソ中立条約, Nisso Chūritsu Jōyaku), also known as the Japanese–Soviet Non-aggression Pact (日ソ不可侵条約, Nisso Fukashin Jōyaku), was a non-aggression pact between the Soviet Union and the Empire of Japan signed on April 13, 1941, two years after the conclusion of the Soviet-Japanese Border War. The agreement meant that for most of World War II, the two nations fought against each other's allies but not against each other. In 1945, late in the war, the Soviets scrapped the pact and joined the Allied campaign against Japan.