The Battle of Antietam, also known as the Battle of Sharpsburg, was a battle of the American Civil War fought on September 17, 1862, between Confederate general Robert E. Lee's Army of Northern Virginia and Union general George B. McClellan's Army of the Potomac near Sharpsburg, Maryland, and Antietam Creek. Part of the Maryland campaign, it was the first field army–level engagement in the eastern theater of the American Civil War to take place on Union soil. It remains the bloodiest day in American history, with a combined tally of 22,727 dead, wounded, or missing. Although the Union Army suffered heavier casualties than the Confederates, the battle was a major turning point in the Union's favor. This 1862 illustration by Edwin Forbes shows the charge across Burnside's Bridge, which took place during the Battle of Antietam.Illustration credit: Edwin Forbes; restored by Adam Cuerden