Ambrose Burnside was also part of the grand assault, advancing against the eastern leg of the Mule Shoe before dawn. The attack by his division under Brig. Gen. Robert B. Potter against the sector just below Steuart's Brigade materially aided Hancock's breakthrough. The North Carolina brigade of Brig. Gen. James H. Lane fought back, reinforced by a Georgia brigade under Brig. Gen. Edward L. Thomas and the North Carolina brigade of Brig. Gen. Alfred M. Scales. The two sides became stalemated. At 2 p.m., Grant and Lee coincidentally ordered simultaneous attacks. Grant considered this sector to be lightly defended and hoped for a new breakthrough while Lee wanted to take out an artillery position that the IX Corps was using to harass his line. The advance by Union Brig. Gen. Orlando B. Willcox's division against a minor salient in the line was stopped as Lane's brigade moved forward and hit them in the flank.