article: Battle of South Mountain
links: Army of the Potomac Sympathy Confederate States of America Second Battle of Bull Run Battle of Antietam General officer Robert E. Lee Harpers Ferry Armory Army of Northern Virginia Richmond, Virginia Union Army France Special Order 191 Maryland Campaign President of the United States Sharpsburg, Maryland Potomac River Great Britain Stonewall Jackson Abraham Lincoln Major General Northern United States Capital (city) Union (American Civil War) George B. McClellan Battle of Harpers Ferry Maryland Confederate States Army Mountain pass