antietam national battlefield in maryland bloody lane

agriculture antietam arranged background battle battlefield bloody brightlt brightly building caisson casualties closeup colored confederacy confederate constant contingent display eventually exposure famous federal fighting foreground honoring inmaryland landmark landscape located maryland marylandcannon monastery monument monuments morning national nearby northern outcrops pennsylvania plaques potomac repulsed sharpsburg showing smoothbore soldiers stronghold structures suffered undefined vehicle virginia weathered wjiyrcannon