...nty-first Ohio was detached to Clarksville, Tennessee, and the Sixth and Eighth Missouri were transferred to my division. In a few days after the battle, General Halleck arrived by steamboat from St. Louis , pitched his camp near the steamboatlanding, and assumed personal command of all the armies. He was attended by his staff, composed of General G. W. Cullum, U. S. Engineers, as his chief of staff; ...