The American-British-Dutch-Australian (ABDA) Command, or ABDACOM, was the short-lived supreme command for all Allied forces in South East Asia in early 1942, during the Pacific War in World War II. The command consisted of the forces of Australia, the Netherlands, United Kingdom and the United States. The main objective of the command, led by General Sir Archibald Wavell, was to maintain control of the "Malay Barrier", a notional line running down the Malay Peninsula, through Singapore and the southernmost islands of the Dutch East Indies. ABDACOM was also known in British military circles as the "South West Pacific Command", although it should not be confused with the later South West Pacific Area command.

The Pacific War, sometimes called the Asia–Pacific War or the Pacific Theater, was the theater of World War II that was fought in eastern Asia, the Pacific Ocean, the Indian Ocean, and Oceania. It was geographically the largest theater of the war, including the vast Pacific Ocean theater, the South West Pacific theater, the Second Sino-Japanese War, and the Soviet–Japanese War.