Battle of Antietam


 * Lincoln issued the Emancipation Proclamation afterward
 * Bloodiest single day in US history
 * Also known as the Battle of Sharpsburg
 * Began with an attempt by I Corps to seize the Dunker Church against entrenched Confederates
 * The attacking commander refused to commit his reserves to this attack on Bloody Lane
 * Allan Pinkerton fed one general's belief that the attackers were outnumbered by "at least 25%"
 * One commander said "tell him if it costs 10000 men he must go now," after one of his generals failed to capture a key objective