• The Maryland State Monument is the only monument at Antietam dedicated to both sides.
• 500 cannons participated in the Battle of Antietam.
• Antietam was the bloodiest single-day battle (12 hours) in American history, with about 23,000 killed, wounded or missing.
• There was a total of about 45,000 Confederate and 90,000 Union solders on the battlefield.
• This battle marked the first time the Confederate troops ventured into northern territory.
• The only general that did not die from wounds obtained in the Battle of Antietam was Confederate General Alfred Colquitt.
• The Burnside Bridge before the battle was named for the Rohrbach family, whose farm was nearby.
• After the battle President Abraham Lincoln issued the Emancipation Proclamation.
• The battlefield is host to at least 300,000 visitors a year.
• Antietam Battlefield was established in 1890 by the War Department.
• The 15th Massachusetts Infantry went into the Battle of Antietam with 606 soldiers. 318 were killed or wounded.
• The 1st Texas Infantry lost 82% of their men while fighting in the Cornfield at Antietam.
• Nurse Clara Barton was present at the battle taking care of wounded soldiers.
• Photographer Alexander Gardner took the first photos of dead soldiers on an American battlefield after the Battle of Antietam.
• The 51st Pennsylvania regiment was led by Colonel John Hartranft. Along with the 51st New York, they finally succeeded in crossing the Lower Stone Bridge after being promised a ration of whiskey.
• The Dunker church congregation were German Baptist Brethren were known as "dunkers" because they practiced baptism by total immersion. Their church building was a simple structure without a steeple, which they might have considered to be vain.pâ.Žù