where was the battle of antietam creek?
Pennsylvania Maryland
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 The Battle of Antietam / ænˈtiːtəm / , also known as the Battle of Sharpsburg , particularly in the South , fought on September 17 , 1862 , near Sharpsburg , Maryland and Antietam Creek as part of the Maryland Campaign , was the first major battle in the American Civil War to take place on Union soil . It is the bloodiest single @-@ day battle in American history , with a combined tally of 22 @,@ 717 dead , wounded , or missing . 

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 The Battle of Antietam was depicted ( at the beginning ) in the film Glory ( 1989 ) , directed by Edward Zwick and starring Matthew Broderick , Denzel Washington , Cary Elwes , and Morgan Freeman . 

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 The Union army reached Antietam Creek , to the east of Sharpsburg , on the evening of September 15 . A planned attack on September 16 was put off because of early morning fog , allowing Lee to prepare his defenses with an army less than half the size of McClellan 's . 

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 The Battle of Antietam had been a tactical stalemate . McClellan claimed it as a strategic victory as Lee 's army retreated back into Virginia . Despite this , President Lincoln was displeased with McClellan 's failure to pursue Lee and replaced him with Maj. Gen. Ambrose Burnside . During November 1862 , Burnside proceeded to gather the Army of the Potomac in Falmouth , Virginia , preparing to assault Lee 's army across the Rappahannock River in Fredericksburg , Virginia . 

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 The Battle of Antietam on September 17 , 1862 , was the single bloodiest day in American military history . The outnumbered Confederate forces fought desperately and well . Despite significant advantages in manpower , McClellan was unable to concentrate his forces effectively , which meant that Lee was able to shift his defenders to parry each of three Union thrusts , launched separately and sequentially against the Confederate left , center , and finally the right . McClellan was also unwilling to employ his ample reserve forces to capitalize on localized successes . Historian James M. McPherson has pointed out that the two corps McClellan kept in reserve were in fact larger than Lee 's entire force . The reason for McClellan 's reluctance was that , as in previous battles , he was convinced he was outnumbered . 
