The Tripartite Pact, also the Three-Power Pact, Axis Pact, Three-way Pact or Tripartite Treaty was a pact signed in Berlin, Germany on September 27, 1940, which established the Axis Powers of World War II. The pact was signed by representatives of Nazi Germany (Adolf Hitler), Fascist Italy (foreign minister Galeazzo Ciano), and Imperial Japan (Japanese ambassador to Germany Saburo Kurusu).
The three nations agreed that for the next ten years they would "stand by and co-operate with one another in... their prime purpose to establish and maintain a new order of things... to promote the mutual prosperity and welfare of the peoples concerned." They recognized each other's spheres of interest and undertook "to assist one another with all political, economic and military means when one of the three contracting powers is attacked" by a country not already involved in the war, excluding the Soviet Union.
The pact supplemented the Anti-Comintern Pact of 1936 and helped heal the rift that had developed between Japan and Germany following the 1939 Molotov-Ribbentrop Pact between Germany and the Soviet Union.