150 Years ago today: Antietam, the bloodiest single day in the American Civil War (Updated)

True, Gettysburg cost far more casualties, but was fought for three days. Antietam/ Sharpsburg was fought in 12 hours.

From the UK Mail; The lost document that changed the course of American history: How Robert E. Lee's secret Civil War battle plans were found wrapped around cigars under a locust tree - and ended up in Union hands

Animated map of the Battle of Antietam

Many Sharpsburg homes have Civil War history   "Walking through the rooms of the Piper House, Ray pointed out the bullet damage to doors and window frames. The nose of a lead bullet protrudes from a window frame and the end of another can be seen half buried in a door.
...."The Piper House drew Union fire — collateral damage, really — because the troops were aiming at Confederates in the steeple of a long-gone Lutheran church down the street, Ray said.
The Pipers fled town during the fighting. They returned to find two dead Confederate soldiers in the dining room, she said."   Video report on historic Sharpsburg homes

Confederate site, referring to the battle, naturally as the Battle of Sharpsburg
A virtual tour ,
The cornfield,  Carnage in a Cornfield 
Bloody Lane
From "Glory"; the opening scene depicting the Battle of Antietam

UPDATE: Antietam 360  Excellent virtual tour of the battlefield, Hat tip to Bill Newcomer in the Civil War Facebook page.Thank you, Bill. From Civil War Trust.

Antietam on Facebook.  Videos.