The significant military alliance between Germany, Italy, and Japan during World War II was known as the Axis Powers. Formed in the late 1930s, this coalition opposed the Allied Powers, which included countries like the United States, the United Kingdom, and the Soviet Union. The Axis Powers sought to expand their territories through aggressive military campaigns and shared an ideology that favored fascism and militarism. Their collaboration led to significant military conflicts across Europe, Asia, and the Pacific. As the war progressed, internal disagreements and strategic failures weakened this alliance, ultimately leading to their defeat in 1945.