Northern Name for Battle: Antietam Southern Name for Battle: Sharpsburg Location of Battle: Washington County, Maryland Date of Battle: September 17, 1862 Northern Commander: George B. McClellan Southern Commander: Ambrose Powell Hill Winner: Tie Northern Troops Involved: 87,000 Southern Troops Involved: 45,000 Northern Casualties: 12,410 Southern Casualties: 13,724 Interesting Facts: This battle was the fifth costliest battle of the civil war.