Nazi Germany and the Empire of Japan signed the Anti-Comintern Pact, agreeing that, if the Soviet Union attacked one of them, they would consult each other on what measures to take to "safeguard their common interests".

The Anti-Comintern Pact, officially the Agreement against the Communist International was an anti-communist pact concluded between Nazi Germany and the Empire of Japan on 25 November 1936 and was directed against the Communist International (Comintern). It was signed by German ambassador-at-large Joachim von Ribbentrop and Japanese ambassador to Germany Kintomo Mushanokōji. Italy joined in 1937, but it was legally recognized as an original signatory by the terms of its entry. Spain and Hungary joined in 1939. Other countries joined during World War II.