Mary Lee Stubbs and Stanley Russell Connor, ARMOR-CAVALRY: Part 1; Regular Army and Army Reserve…
“ But by late 1943 the War Department decided that armored divisions could be employed properly by standard corps, and it directed that the II, III, and IV Armored Corps be redesignated as the XVIII, XIX, and XX Corps, respectively. The I Armored Corps had already been inactivated overseas and its personnel used in the organization of Seventh Army headquarters. The basic element of the Armored Force was the armored division- a complete, self-sufficient, combined arms team, whose components, strength, and equipment varied during the war. ”
