Antietam National Battlefield — Sharpsburg, MD

The bloodiest single day in American history — roughly 22,000 casualties in twelve hours.

Why it matters

The Union's costly hold here gave Lincoln the footing to issue the Emancipation Proclamation.

Nearby in Maryland

Fort McHenry

Baltimore, MD

Maryland State House

Annapolis, MD

Monocacy National Battlefield

Frederick, MD

USS Constellation

Baltimore, MD

Star-Spangled Banner Flag House

Baltimore, MD

B&O Railroad Museum

Baltimore, MD