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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150th Battle Anniversary
Antietam National Battlefield will observe the 150th Anniversary of the battle September 15-17, 2012.
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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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Did You Know?
William McKinley served at Antietam as a Commissary Sergeant in the 23rd Ohio Infantry before becoming the nation’s 25th President. A monument to him at Antietam was dedicated in his memory on October 13, 1903, two years after he was assassinated.