During January and February 1942, the division lost one of its infantry regiments when, like all U.S. Army divisions, its "square" infantry division structure was reorganized into a triangular organization, centered on three instead of four infantry regiments. It was left with the 126th Infantry Regiment, 127th Infantry Regiment, and the 128th Infantry Regiment. The three existing artillery regiments (120th, 121st and 126th) were converted into four separate battalions (120th, 121st, 126th and 129th), and supporting units. In early February 1942 it received a new commander, Major General Edwin F. Harding.