Hancock's assault was scheduled to commence at 4 a.m., but it was still pitch black and he delayed until 4:35, when the rain stopped and was replaced by a thick mist. The attack crashed through the Confederate works, virtually destroying Jones's Brigade, now commanded by Col. William Witcher. As Barlow's division swung around to the eastern tip of the Mule Shoe, it overran the brigade commanded by Brig. Gen. George "Maryland" Steuart, capturing both Steuart and his division commander, Allegheny Johnson. On Barlow's right, Brig. Gen. David B. Birney's division met stronger resistance from the brigades of Col. William Monaghan and Brig. Gen. James A. Walker (the Stonewall Brigade).