Video: Sept. 17, 1862 (second part at 49:00)

(Wednesday, September 17, 1862, 9:30 a.m. to 1:00 p.m. local time, part of the Maryland Campaign during the American Civil War) — The second of three battles in the Battle of Antietam, the bloodiest battle day in U.S. history (located near Maryland’s Antietam Creek at Sharpsburg), began this morning as Union troops under Gen. Edwin Sumner inflicted devastating casualties on the Confederates along a sunken road that became known as “Bloody Lane.”

This fighting alone left about 5,600 casualties (killed/wounded/captured/missing) out of 22,717 for the entire day.