 The two regiments accompanied the corps trains to Rock Creek Church, near the battlefield.After the battle, regiment participated in the pursuit of Lee's Army of Northern Virginia across the Catoctin mountains to Middletown, Maryland, then back over South Mountain, through Boonsboro, to Williamsport by July 14.The regiment marched to Harper's Ferry, across South Mountain again, and camped near Petersville, near Berlin (present-day Brunswick).