日独伊三国同盟
The Tripartite Pact (also called the Three-Power Pact, the Axis Pact, the Three-way Pact or the Tripartite Treaty), an agreement signed in Berlin on September 27, 1940, linked Germany, Italy and Japan as the Axis powers of World War II. On November 24, 1940, Slovakia also signed the Tripartite Pact. Hitler asked the newly formed Slovak Republic (independent from March 1939) to join the invasion of Poland.