This Day in Georgia Civil War History
September 18, 1862
There was some light skirmishing around Antietam, while Robert E. Lee moved his wounded south of Potomac River. Most of this day was devoted to retrieving and caring for the wounded, and burying the dead.
Some 36,000 Union forces had not been involved in the battle; Lee braced for another attack, but George McClellan (showing characteristic hesitation) never employed these men. After nightfall, Lee began moving his entire army back into Virginia.