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The Battle of Antietam, marked as the bloodiest single day in American military history, was a significant turning point in the Civil War. Fought on September 17, 1862, it involved Union General George B. McClellan clashing with Confederate General Robert E. Lee's forces. The Union's strategic victory led to the end of Lee's northern invasion, the issuance of the Emancipation Proclamation, and a shift in the war's momentum. This battle also underscored the war's brutal human cost and influenced international perceptions of the conflict.
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The Battle of Antietam took place on September 17, 1862, near Sharpsburg, Maryland
Union Army
The Union Army, led by General George B. McClellan, had superior numbers and strategic advantage
Confederate Army
The Confederate Army, led by General Robert E. Lee, was making their first invasion of the North with the Army of Northern Virginia
In the days before the battle, Lee's forces positioned themselves near Sharpsburg, Maryland, while McClellan delayed his attack, allowing Lee to fortify his defenses
The battle opened with the Union's assault on the Confederate left flank near Dunker Church, resulting in significant leadership losses for the Union
The Bloody Lane
The Union's 2nd Corps faced fierce resistance and suffered heavy losses while attacking the sunken farm road known as "The Bloody Lane."
Union Advance Stalls
The Union's advance was stalled due to the death of Major General Israel B. Richardson and McClellan's hesitation to send in additional forces
Union General Ambrose Burnside's corps faced delays and resistance but eventually took control of Burnside's Bridge, preventing a decisive Union breakthrough
Despite no clear tactical victor, the Union's strategic advantage led to Lee's battered forces withdrawing to Virginia, ending the Confederate incursion into the North
President Abraham Lincoln replaced McClellan as commander of the Army of the Potomac and used the Union's performance at Antietam to issue the Emancipation Proclamation, redefining the war's objectives and allowing African Americans to enlist in the Union forces
The Battle of Antietam was a watershed moment in the Civil War, halting Lee's northern advance and reducing the likelihood of European powers recognizing and supporting the Confederacy