In the battle of Antietam, 22, 717 men died, were wounded or lost in action.
The battle of Antietam took place in Maryland. It was fought on Wednesday September 17, 1862 at a place called Antietam Creek in Sharpsburg, Washington county.
There was no clear winner between Union and Confederate armies. The reason for the horrendous number of casualties was the dense foggy weather on that day, made even worse by the thick smoke of gunfire. The intense close-quarter fighting also contributed significantly to the high casualty figure.