The success of his army in the fighting on July 1 encouraged Lee to renew the battle on July 2. An early morning reconnaissance of the Federal left revealed that their line did not extend as far south as Little Round Top. Lee directed Longstreet to take two divisions of I Corps and march south until they reached the flank of the Federal forces. They would attack from this point, supported by a division of A.P. Hill's corps - a total force of nearly 20,000 men. While Longstreet carried out the main offensive, Ewell was ordered to conduct a demonstration against the Federal right. However, he was given discretion to mount a full-scale attack should the opportunity present itself.
The Federal army was well prepared for Lee's offensive. Six of its seven corps had arrived on the battlefield, and VI Corps was making a thirty-six-mile forced march to reach it. Meade had deployed his army in a fish-hook-shaped formation, with the right on Culp's Hill and Cemetery Hill, the center along Cemetery Ridge, and the left on Little Round Top. The left of the Federal line was held by Major General Daniel Sickles's III Corps. Sickles was dissatisfied with his assigned position and in the early afternoon, without orders, he advanced his line nearly half a mile west in order to take advantage of the high open ground around a nearby peach orchard.
Soon after Sickles took up this new position, Longstreet attacked. Third Corps was hard pressed and Meade sent V Corps and part of 11 Corps to reinforce Sickles in the Peach Orchard. But, after furious fighting, Longstreet's forces broke through, causing Sickles's entire line to collapse. The Confederates pursued to the base of Little Round Top, but Federal reinforcements, including elements of VI Corps, checked their advance. Farther north, elements of a division of the Confederate III Corps advanced to the slopes of Cemetery Ridge before they too were forced to retire.
On the Federal right, Ewell did not attack until evening, after Longstreet's onslaught had subsided. The effort to storm Cemetery Hill was ultimately unsuccessful. Ewell's attacks were also repulsed at Culp's Hill, although a foothold was gained near the base of the hill.
The second day's fighting had cost each army some 9,000 casualties. Lee's forces had again gained ground, but had failed to dislodge the Federal army from its strong position.
