The Battle of Antietam

September 17, 1862, was the bloodiest day in the history of the United States. In just 12 hours, 22,726 people were killed, wounded, or went missing just outside of Sharpsburg, Maryland, in one of the largest battles of the US Civil War. Despite ending in a draw, the Union's ability to hold off the Confederates was a major win, with significant political ramifications that helped shift the course…