Question

The Battle of Antietam (also known as the Battle of Sharpsburg), fought on 17 September 1862, the first major battle in the American Civil War to take place on Northern soil has what other distinction in US history?

Answer 1

The bloodiest single-day battle
Union losses were 12,401 casualties and 2,108 dead (25% of those present). Confederate casualties were 10,318 and 1,546 dead (31%). More Americans died than on any other day in US military history.