The two Union brigades advanced and overran the skirmish line. They then came under heavy artillery fire from a Confederate battery on the west side of the railroad. When the brigades passed Granbury's Lunette, they were struck by very heavy close range enfilading fire. Both brigades retreated in some disorder, but they were reformed and continued for the rest of the day to fire on the Confederate works from the former skirmish line. The attack failed in its purpose, since the Confederates were not distracted and in fact had sent brigades from both Lee's and Cheatham's Corps to bolster the threatened left flank.