The List of major U.S. Commands of World War II includes major military commands of the United States. These are units above corps level.

Major armies Commands

Army Air Forces (USAAF): Formed 9 March 1942.
Army Ground Forces (AGF): Formed 9 March 1942.
Army Service Forces (ASF): Formed 9 March 1942 as Services of Supply (USASOS); renamed on 12 March 1943.

Theater commands

European Theater of Operations (ETO): Formed 8 June 1942.
North African Theater of Operations (NATO): Formed 4 February 1943. Redesignated Mediterranean Theater of Operations (MTO) on 1 November 1944.
Central Pacific Area (COMCENPAC): Primary subordinate command of Pacific Ocean Areas, also commanded by Chester W. Nimitz through the war.
North Pacific Area (COMNORPAC): Formed in April 1942 as a subordinate command of Pacific Ocean Areas, commanded by Robert A. Theobald to January 1943, Thomas C. Kinkaid to October 1943, and Frank J. Fletcher through the end of the war.
Pacific Ocean Areas (CINCPOA): Formed in April 1942 as primarily Navy command in the Pacific, consisting of Central Pacific Area, South Pacific Area, and North Pacific Area. Commanded by Chester W. Nimitz through the war.
South Pacific Area (COMSOPAC): Formed in April 1942 as a subordinate command of Pacific Ocean Areas, commanded by Robert L. Ghormley through October 1942, William Halsey, Jr. to June 1944, John H. Newton to March 1945, and Admiral William L. Calhoun to the end of the war.
Southeast Pacific Area (COMSOEASPAC): Formed in April 1942. Never became an active theater of war. Commanded by Ernest King throughout the war.
South West Pacific Area (COMSOWESPAC): Formed on 30 March 1942. Commanded by Douglas MacArthur throughout the war.
China Burma India Theater (CBI): Formed 2 February 1944. Commanded by Joseph W. Stilwell. Split into China Theater under Albert Coady Wedemeyer and India Burma Theater under Daniel I. Sultan on 24 October 1944.

Army groups

Armies

First United States Army: Existed prior to the war, shipped to England in October 1943. Landed at Normandy and was in North-West Europe through the end of the war. Commanded by Omar Bradley from October 1943 to August 1944, and Courtney Hodges thereafter.
Second United States Army: Remained in the United States through the war.
Third United States Army: Existed prior to the war, shipped to England in January 1944. Shipped to France in July 1944 and remained in North-West Europe through the end of the war. Commanded by George S. Patton from January 1944 to the end of the war.
Fourth United States Army: Remained in the United States.
Fifth United States Army: Activated in August 1943 at Algiers. Landed at Salerno in September 1943 and remained in Italy through the war. Commanded by Mark W. Clark to November 1944 and Lucian Truscott through the end of the war.
Sixth United States Army
Seventh United States Army
Eighth United States Army
Ninth United States Army
Tenth United States Army
Fifteenth United States Army

Fleets

Seaboards

Naval Task Forces

Task Force 38
Task Force 58

Naval Forces

United States Naval Forces Europe
Naval Forces France
United States Naval Forces Germany
Amphibious Force, Pacific Fleet (ComPhibPac)
Amphibious Force North Pacific
Amphibious Force South Pacific
Amphibious Force South-West Pacific
Amphibious Training Command
III Amphibious Force
V Amphibious Force
VII Amphibious Force
IX Amphibious Force
XI Amphibious Force

Marine commands

Fleet Marine Force, Pacific (FMFPac)
III Amphibious Corps (III AC)
V Amphibious Corps (VAC)

Major armies Commands

Theater commands

Army groups

Armies

Fleets

Seaboards

Naval Task Forces

Naval Forces

Marine commands

Air Forces

See also