 Only a few hundred Virginians reached the Union line, and within minutes, they all were dead, dying, or captured. In less than an hour, more than 7,000 Confederate troops had been killed or wounded. Both armies exhausted held their positions until the night of July 4th when Lee withdrew. The Army of the Potomac was too weak to pursue the Confederates, and Lee led his army out of the North, never to invade it again.