日独伊三国同盟
On 25 March 1941, Prince Paul of Yugoslavia signed the Tripartite Pact, allying the Kingdom of Yugoslavia with the Axis powers. Prince Paul was overthrown, and a new anti-German government under Peter II and Dušan Simović took power. The new government withdrew its support for the Axis, but it did not repudiate the Tripartite Pact. Nevertheless, Axis forces, led by Nazi Germany invaded Yugoslavia in April 1941.