In the meantime, the IV Corps had been tasked with making a frontal assault from Granny White and Hillsboro Pikes on the left end of the Confederate line. The assault was to begin once Smith's troops began their assault on the left flank redoubts. The Confederate line was supposed to lie on Montgomery Hill on the north side of Brown's Creek. While the Confederates had originally established their line there, they had withdrawn to equally strong positions on the south side of Brown's Creek, as the original positions were exposed to artillery fire from the Nashville forts. The IV Corps proceeded deliberately up Montgomery Hill, only to find that it was defended by a thin skirmish line. They stopped to reorganize, and at about the same time that Smith's Detachment was rolling up the Confederate redoubts, they advanced on the main Confederate line.