 The 16th marched with the brigade from Wolf Run Shoals on June 25, crossed the Potomac river on June 27, at Edward's Ferry, and moved north through Frederick City and Creagerstown, Maryland.It was drawing near Gettysburg on July 1, when the 12th and 15th regiments were detached to guard the corps trains.The two regiments accompanied the corps trains to Rock Creek Church, near the battlefield.