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555th Signal Aircraft Warning Battalion


The Signal Aircraft Warning Battalions that were in the European Theatre of Operations (ETO) were US Army Signal Corps units who worked with Army Air Corps Fighter Control Squadrons primarily to direct fighters and fighter-bombers to their targets. Each battalion had strength of about 1,000 men. Many were highly trained technicians and engineers. They were operating tactical units of the Ninth Air Force (The US Air Force was not established as a separate branch of the armed forces until after WW II). During the campaign in Northern Europe air support for each of the three Armies was provided by a Tactical Air Command (TAC). A Signal Aircraft Warning Battalion (SAW Bn.) was assigned to each TAC. The 555th SAW to IX TAC, First Army, -- the 563rd SAW to XIX TAC, Third Army, -- the 573rd SAW to XXIX TAC, Ninth Army. Two battalions, the 564th & 566th, were assigned to Ninth Air Force air defense missions.

Functionally the battalions provided radar location, “friend or foe” identification, and visual front-line ground observer information to the Air Corps controllers located at the radar sites, and at the TAC operations centers where command decisions and aircraft dispatch orders originated.

These battalions were equipped with radar, radio, telephone, teletype and encryption equipment that was “state of the art” at the time. The systems they used to track and communicate with fighters were the forerunners of today's air traffic control systems, and the radar weather maps seen in TV weather reports. Every microwave oven contains a descendant of the high power magnetrons used in the radar transmitters. Almost every thing the SAW Battalions did, and the equipment they used, was a big secret.

Some of the men in these units were on special duty as radio operators on offshore ships during D-Day. Others were ground observers and in radar crews that landed with light-weight radar equipment on D-Day. They provided enemy and friendly aircraft tracking and warning information to the landing ground forces. As the invasion progressed in the following weeks additional units and heavier equipment were landed. Some of the radar sets weighed as much as 30 tons. All of this great activity could not have happened if each of the battalions had not contained several hundred support personnel to prepare and serve the meals, keep the trucks and power plants running, obtain supplies and fuel, and handle the paper work. By October 1944 all of the battalions were on the Continent supporting fighter and fighter-bomber operations of the Ninth Air Force.

Veterans of the Signal AW Battalions that were in the ETO gather every year or so to reminisce, tell war stories over again, brag about their younger generations, and visit interesting sites and museums. This year they are gathering on the Queen Mary. Most of veterans who will attend traveled to Europe on the ship in late 1943 and January 1944 in the company of about 13,000 fellow travelers. The January 1944 voyage was memorable in that the North Atlantic winter weather, the high ship speed, and the continual “zig–zaging” of the ship’s course combined to provide much rolling and pitching. On occasion water came over the bow and the ship’s roll led to sea sickness for many of the” land lubber” troops. We now look forward to being aboard the Queen Mary in a calm sea.

All veterans are welcome to the gatherings who were in aircraft warning and control or related units whether they were in Iceland, Africa, and the Pacific, Alaska or the Zone of Interior. The WW II vets are now in their eighties, and a few in their nineties. Children and grandchildren are essential to the organization and support of our gatherings. The SAWBUCK GAZETTE, a “for fun” letter, published three times annually, attempts to refresh veterans and their families as to what the SAW Battalions did during the war.

Prepared by:
William L. Freienmuth, Veteran of the 573rd Signal AW Battalion
903 D Wesley Drive, Quincy, PA 17247-0128
August 2008

Originally constituted as the 555th Signal Aircraft Warning Battalion, the unit served as an aircraft warning unit in defense of the continental United States from 1942 to 1943. The battalion moved to England in 1944 where it provided communications support until the day after the Normandy landings when it moved to support the invading forces in France. It moved frequently to support elements of Ninth Air Force, arriving in Belgium in September and Germany in March 1945. It continued its mission during the occupation of Germany from 1945. At the end of 1945, the battalion was converted to an Air Corps unit, re-designated the 501st Tactical Control Group and its component companies replaced by Aircraft Control and Warning Squadrons. It provided radar coverage and navigational aid to Allied aircraft flying over the US Zone of Occupied Europe in 1946 and 1947. It was inactivated in 1947.


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Station Location Date
Transited through Southampton 11 June 1944 – 15 June 1944
Based Cricqueville 2 July 1944 – 8 July 1944
Based Paris 4 September 1944 – 13 September 1944
Based Charleroi 13 September 1944 – 26 September 1944
Based Ibsley



  • George Hamilton

    Military | Corporal (5th Grade) | Control Net Systems Radio Operator
    85 Line Ave., Cresson, Pa.

  • Alberth Riemer

    Military | First Lieutenant | Navigator | 453rd Bomb Group

  • Walter Weed

    Military | Staff Sergeant (3rd Grade) | Control Net Systems Radio Operator
    110 Thames St., New London, Connecticut

  • Kelley Westbrook

    Military | Staff Sergeant (3rd Grade) | Control Net Systems Chief
    After moving to A-5 in Normandy, various men from the section, including the entire CNS crew headed by Staff Sgt. Westbrook, left to go on detached service, operating fighter Control Net Systems throughout the battle of France and Belgium. (http://www...

  • Douglas White

    Military | Corporal (5th Grade) | Radio Mechanic, Army Air Force, 759 | 404th Fighter Group
    Doug was one of nine men in the Control Net System group of the Communications section of the 508th Fighter Squadron, 404th Fighter Group, 8th Air Force, United States Army Air Corps. He operated and maintained an SCR-584 Radar Van at RAF Winkton and...


unit locations: accessed 30Jun2018

unit description edited from: accessed 30Jun2018

Last paragraph of unit description from: accessed 30Jun2018


Date Contributor Update
30 June 2018 16:58:05 508thRadarMan Changes to citations and description

unit locations: accessed 30Jun2018

unit description edited from: accessed 30Jun2018

Last paragraph of unit description from: accessed 30Jun2018

Date Contributor Update
30 June 2018 16:11:57 508thRadarMan Changes to type, citations, description and stations
Sources accessed 30Jun2018 accessed 30Jun2018

Date Contributor Update
27 September 2014 18:42:54 AAM AAM ingest

Units in the UK from ETOUSA Station List, as transcribed by Lt. Col. Philip Grinton (US Army, Retired) and extracted by IWM; air division data from L.D. Underwood, based on the 8th Air Force Strength Report of 6th August 1944, as published in 'The 8th Air Force Yearbook' by Lt. Col. John H Woolnough (1980)