The Bloodiest One Day Battle in American History
23,000 soldiers were killed, wounded or missing after twelve hours of savage combat on September 17, 1862. The Battle of Antietam ended the Confederate Army of Northern Virginia's first invasion into the North and led to Abraham Lincoln's issuance of the preliminary Emancipation Proclamation.
Features
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Learn More about the Battle
Find out more about the people, places and events that are part of the campaign that changed America.
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Support Your Antietam
Help preserve your Battlefield. Plant a tree, become a Partner, donate to preserve a cannon or monument, just a few examples of how you can help
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Social Media
Go to our Social Media sites to see the latest stories and images from the Battlefield.
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Did You Know?
Alexander Gardner's photographs of Antietam were the first ever images to show dead soldiers on the field of battle. A New York Times article about the photographs said it was if the "dead had been laid at our doorsteps." More...