Stalin's speech of 19 August 1939

A secret speech was allegedly given by Joseph Stalin, on 19 August 1939, to members of the Politburo, wherein he justified the Soviet strategy to promote military conflict in Europe, which would be beneficial for the future territorial expansion of the Communist system. The strategy included Soviet-Nazi collaboration and the suggestion of what has become the Molotov–Ribbentrop Pact.

The historicity of the speech is still the subject of academic debate. Plausible textual evidence of this speech found in various reputable archives has been academically studied and published, however no formal first-hand evidence of a Politburo meeting held on 19 August 1939 or the delivery of the quoted speech has yet been proven.