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.
Haunted Tank
An origin story in "G.I. Combat" #114 reveals that, at the time of the ghost's arrival, Jeb is a sergeant in the United States Army who commands a Stuart tank fighting with the Allies in the North African Campaign. Jeb and his men are childhood friends who had volunteered for the cavalry when World War II began. The original crew consists of Jeb as tank commander; Arch Asher, loader; Rick Rawlins, gunner; and Slim Stryker, driver.