Ninth Air Force (United States Army Air Forces)

Ninth Air Force (United States Army Air Forces)
Unit name	Ninth Air Force (United States Army Air Forces)
Dates	1942–1945
Country	United States
Branch	United States Army Air Forces
Type	Air force
Role	Tactical air operations
Notable commanders	Lewis H. Brereton, Hoyt S. Vandenberg, Mark W. Clark

Ninth Air Force (United States Army Air Forces) was a numbered air force of the United States Army Air Forces active during World War II. It developed tactical doctrines linking air superiority to combined operations with First United States Army, Fifth United States Army, and US Eighth Army, playing central roles in the North African Campaign, Invasion of Sicily, Invasion of Normandy, and the Western Allied invasion of Germany. The organization integrated bomber, fighter, reconnaissance, and troop carrier units to support ground offensives from Operation Torch through Operation Varsity.

History

Formed from units in the United States Middle East and North African Campaign theaters, Ninth Air Force emerged as a successor to the United States Army Middle East Air Force and the Ninth Air Force (United Kingdom) liaison efforts during early 1942. Under commanders such as Lewis H. Brereton and Hoyt S. Vandenberg, it shifted from strategic support for the Desert War against Erwin Rommel's Afrika Korps to close air support for United States Fifth Army and British Eighth Army formations during Operation Husky. In 1943–44 Ninth reorganized for the European Theatre of World War II for the Combined Bomber Offensive and prepared for Operation Overlord alongside Supreme Headquarters Allied Expeditionary Force planning. During the Battle of Normandy and the Battle of the Bulge, Ninth coordinated with Twelfth Army Group, 21st Army Group, and Allied Expeditionary Air Force elements to interdict German Army movements and supply lines. Ninth's postwar disposition fed into the establishment of United States Air Forces in Europe and later USAF numbered air forces.

Organization and Units

Ninth's organizational structure encompassed numbered bombardment groups, fighter groups, troop carrier groups, and reconnaissance groups drawn from units like the 57th Bombardment Wing, 66th Fighter Wing, 1st Tactical Air Force, and the IX Troop Carrier Command. Components included famed formations such as the 27th Fighter Group, 78th Fighter Group, 363d Fighter Group, 354th Fighter Group, 67th Tactical Reconnaissance Group, 390th Bombardment Group, 366th Fighter Group, and 373d Fighter Group. Support units included the VIII Air Support Command, IX Air Service Command, and tactical control organizations like the Air Observation Corps and Army Air Forces Tactical Center. Ninth integrated personnel from Royal Air Force coordination staffs, liaison with Free French Forces, and attached units from Poland and Czechoslovakia.

Operations and Campaigns

Ninth executed operations across Operation Torch, the Tunisia Campaign, Operation Husky, Salerno landings, and the Anzio landings supporting Allied Mediterranean drives. In preparation for Operation Overlord Ninth moved to the United Kingdom and executed interdiction campaigns against the Atlantic Wall, targeting V-weapon sites, railways, and bridges during Operation Pointblank. On D-Day Ninth's fighter and medium-bomber wings supported the Utah Beach and Omaha Beach sectors and interdicted German Army Group B reinforcements. During the Operation Cobra breakout Ninth provided close air support that aided Third United States Army advances led by George S. Patton Jr.. In the Battle of the Bulge Ninth engaged in counter-air, interdiction, and airlift during Operation Queen and Operation Market Garden follow-on operations. Late-war missions included supporting Rhine crossing operations such as Operation Varsity alongside XVII Airborne Corps and British 6th Airborne Division units.

Aircraft and Equipment

Ninth employed a mix of fighters, medium bombers, attack aircraft, and transports including the Republic P-47 Thunderbolt, North American P-51 Mustang, Lockheed P-38 Lightning, Curtiss P-40 Warhawk, and Supermarine Spitfire in some RAF-coordinated squadrons. Medium and light bomber types included the North American B-25 Mitchell, Douglas A-20 Havoc, Martin B-26 Marauder, and attack aircraft like the Douglas A-26 Invader and Curtiss A-25 Shrike. Reconnaissance used the F-6 (P-51) variant and photographic platforms like the Lockheed F-5 Lightning. Transports and glider operations relied on the Douglas C-47 Skytrain, Waco CG-4, and Airspeed Horsa insertions. Advanced avionics and ordnance integrated HVAR rockets, 20 mm cannons, and early guided munitions trials under Air Technical Service Command logistics.

Commanders

Key commanders included Lewis H. Brereton (early wartime commander), Hoyt S. Vandenberg (strategic and organizational leader), and subordinate wing leaders who coordinated operations with generals such as Omar Bradley, Bernard Montgomery, Mark W. Clark, and Dwight D. Eisenhower. Ninth's staff collaborated with Allied air commanders including Arthur Tedder, Sir Trafford Leigh-Mallory, and Carl Spaatz to align tactical air power with theater strategy. Tactical group leaders included notables from the 1st Tactical Air Force and wing commanders who later influenced United States Air Force doctrine.

Legacy and Lineage

Ninth's doctrinal innovations in close air support, tactical interdiction, and air-ground liaison influenced postwar developments in United States Air Forces in Europe, the Air Force Tactical School, and the eventual establishment of the United States Air Force in 1947. Its lineage connects to later numbered air forces and contributed to Cold War deployments in NATO theaters alongside Royal Air Force units. Veterans and unit histories tied to campaigns such as Operation Torch, Operation Husky, Normandy landings, and the Rhine Campaign are preserved in museums like the Imperial War Museum, National Museum of the United States Air Force, and memorials across France, Belgium, and Luxembourg. Ninth's operational art informed later conflicts, including doctrine applied in Korean War air support and early Vietnam War tactical air operations.

Category:United States Army Air Forces