The Tank Corps, National Army,[2] was the stateside tank unit of the United States Army during and after World War I. Preceded by the Tank Service of the National Army of 15 February 1918 in the 65th Engineers[1] at Camp Meade,[3] the service was removed from the Engineer Corps and organized as the Tank Corps, National Army, with command transferring from Col H. H. Ferguson to Col Ira Clinton Welborn on 9 March.

[1] On 6 March 1918, a Camp Colt, Pennsylvania, for training tank recruits, was established on the Gettysburg Battlefield[4] at the former "Camp, United States Troops, Gettysburg, Pennsylvania.

"[5] On 15 July 1918, Col William H Clopton Jr, arrived in the US[1] and subsequently formed the 2nd stateside tank training center at Tobyhanna, Pennsylvania.

[18] The "Office of Director of the Tank Corps" was absorbed by the command of Brigadier General Samuel D. Rockenbach on 15 August 1919[7] after Rockenbach returned from Europe on 19 July 1919[19] (he had arrived in Europe in June 1917).

[20] In 1919, General John J. Pershing, "appearing before a joint session of the Senate and House Committee on Military Affairs, suggested that the A.E.F.