American-British-Dutch-Australian Command

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. It consisted of the forces of Australia, the Netherlands, United Kingdom and the United States.

Led by General Sir Archibald Wavell, the command's objective was to maintain control of the "Malay Barrier" (or "East Indies Barrier"), a notional line running down the Malay Peninsula through Singapore and the southernmost islands of the Dutch East Indies. ABDACOM was also known within the British military as the "South West Pacific Command" (not to be confused with the later South West Pacific Area command established in March 1942).

Although ABDACOM collapsed only in eight weeks without achieving its aims, it provided some useful lessons for combined Allied commands later in the war and is still studied by contemporary military analysts.