 Complete the following phrase:  In the Northern Virginia Campaign, Barksdales Brigade was stationed at Harpers Ferry, and thus did not participate in the Second Battle of Bull Run. In the Maryland Campaign, his brigade was assigned to the division of Maj. Gen. Lafayette McLaws in Lt. Gen. James Longstreets First Corps of the Army of Northern Virginia. It was one of the brigades that attacked Maryland Heights, leading to the surrender of the Union garrison at 