Early in the morning hundreds more Union troops began crossing the Potomac to join the 500 already there. As they pushed into Shepherdstown they met the Confederate reinforcements commanded by general Stonewall Jackson. Porter, seeing he was badly outnumbered ordered his men back to the Maryland side of the river. But some could not escape before the Confederates opened fire on them. One unit, the 118th Pennsylvania Infantry, was pinned down and could not cross back into Maryland. They were inexperienced and had been issued poor quality muskets that did not always fire. Some scrambled down the cliffs to cross the water under fire. The regiment lost a total of 269 casualties out of 737 men. For the rest of the day the two sides remained in their positions on either side of the Potomac. The battle ended in a stalemate.