On January 24, 1862, Ewell was promoted to major general. His division was left around Culpeper when General Johnston moved his army to the Virginia Peninsula. Ewell moved west, crossing the Blue Ridge, and began serving under Thomas J. "Stonewall" Jackson during the Valley Campaign. Although the two generals worked together well, and both were noted for their quixotic personal behavior, there were many stylistic differences between them. Jackson was stern and pious, whereas Ewell was witty and extremely profane. Jackson was flexible and intuitive on the battlefield, while Ewell, although brave and effective, required precise instructions to function effectively. Ewell was initially resentful about Jackson's tendency to keep his subordinates uninformed about his tactical plans, but Ewell eventually adjusted to Jackson's methods.