The Axis alliance during World War II was headed by Germany, Italy and Japan. Other countries that were affiliated with the Axis included Romania, Hungary, Bulgaria and Thailand.
The Axis alliance was the result of the initial agreements between Germany and Italy. They believed that Germany should have rule over most of continental Europe, Japan over the Pacific and East Asia and Italy over the Mediterranean Sea. The partners wanted to expand their territory through military conquest, with the goal of overthrowing the international order that followed after World War I. They also wanted to destroy or neutralize Soviet Communism.
In October of 1936, the Axis signed an agreement that bound Rome and Berlin. The Anti-Comintern Pact was signed by Germany and Japan in November 1936. It was a pact that was aimed at the Soviet Union. In September 1940, Japan, Italy and Germany signed the Tripartite Pact. This was the official pact that established the Axis alliance. Countries such as Hungary entered the alliance under pressure from the Axis. For example, Hungary was being pressured by Germany to join under the promise of preferential economic treatment. Romania joined because it hoped to win back the territory that had been taken from it by the Soviet Union.