article: Maryland Campaign
links: Army of the Potomac Battle of Antietam Second Battle of Bull Run General officer England Robert E. Lee American Civil War West Army of Northern Virginia Richmond, Virginia Geological formation France Victory Manassas, Virginia Pennsylvania Potomac River Stonewall Jackson US State Field artillery in the American Civil War Abraham Lincoln Major General Federal government of the United States Northern United States Harpers Ferry, West Virginia Capital (city) West Virginia Dixon S. Miles Union (American Civil War) Washington, D.C. Colonel (United States) Jefferson County, West Virginia Confederate Army Union army George B. McClellan Frederick, Maryland Casualty (person) Baltimore Offensive (military) Maryland Sharpsburg, Maryland Shenandoah River