Allen Guelzo, professor of Civil War Era studies, wrote an article about the battle of Antietam for the New York Post. The article appeared on September 16.
From the New York Post:
From 85 feet up in the stone observation tower, you see only a gentle country lane, worn deep into the ground by the unremarkable coming and going of horses and wagons more than a century-and-a-half ago. It startles the imagination to think of that lane as it was near midday on Sept. 17, 1862 — a lethal river brim to its banks with fresh corpses, twisted in the asymmetrical poses of sudden death, arms and legs akimbo, heads cracked and leaking brains.
On that day, that sunken lane became the Bloody Lane — the ground zero of the single costliest day of bloodletting in the American Civil War, the dead center of the battle of Antietam.
When the sun went down on that appalling Wednesday, 3,600 men from Gen. Robert E. Lee’s Confederate Army of Northern Virginia and Gen. George McClellan’s Army of the Potomac were dead. Another 17,000 were wounded. That exceeds Omaha Beach on D-Day, the first day on Iwo Jima and Pearl Harbor.