 Johnson began his attack just before dawn on April 6, 1862.The 41st Ohio was with Buell's army on the eastern bank of the river.Prior to the battle, Colonel Hazen had been promoted to command of the 19th Brigade in the Army of the Ohio, of which the 41st OVI was one of three regiments (the others being the 9th Indiana under Colonel Moody, and the 6th Kentucky under Colonel Whitaker).