The first nine units were deployed during the Louisiana Maneuvers of 1941, equipped with towed 37 mm anti-tank guns (the largest gun that could be towed by a jeep) and surplus 75 mm M1897 guns mounted on half-tracks (the M3 Gun Motor Carriage), and again in the Carolinas maneuvers that November. Their employment was judged a success—though not without some disgruntled voices in the armored branch arguing that the umpires had rigged the results — and on 27 November, Marshall ordered the establishment of a tank destroyer Tactical and Firing Center at Fort Hood, Texas, under Bruce, and the activation of 53 new anti-tank battalions under the command of General Headquarters. The term "tank destroyer" was used from this point on, as it was seen as a more psychologically powerful term. On 3 December, all existing anti-tank battalions were reassigned to General Headquarters and converted to tank destroyer battalions.