The Civil War Battle of Antietam
On Sept. 17, 1862, in the bloodiest single day of the Civil War, an estimated 22,700 men died or were wounded.
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Sept. 17, 1862
In this Sept. 17, 1862 file photo, rebel gunners lie dead beside their smashed battery in a field alongside the whitewashed Dunker Church near Sharpsburg, Md., following the Battle of Antietam.
Credit: AP Photo/Mathew Brady, file
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