Tank
With World War II the multi-turreted tanks proved impracticable, and as the single turret on a low hull design became standard, crews became standardized around a crew of four or five. In those tanks with a fifth crew member, usually three were located in the turret (as described above) while the fifth was most often seated in the hull next to the driver, and operated the hull machine gun in addition to acting as a co-driver or radio operator. Well-designed crew stations, giving proper considerations to comfort and ergonomics, are an important factor in the combat effectiveness of a tank, as it limits fatigue and speeds up individual actions.
Tank Corps, National Army
On 11 November 1918, the Tank Corps had 483 officers and 7700 enlisted men, and the consolidation of tank training had begun at Camp Benning when Dwight D. Eisenhower arrived from Camp Colt on 24 December 1918  (he remained until 15 March 1919,  and about 250 Camp Colt soldiers were transferred to Camp Benning after the armistice.) On 26 December 1918, a portion of the Camp Polk tank school was transferred to Camp Benning "to work in conjunction with the Infantry school". Camp Benning tank troops were moved to Camp Meade from 19–21 February 1919; and Clopton was ordered to Camp Meade on 24 February 1919).