mandelbug definition: Noun (plural mandelbugs) 1. (computing) A software bug whose behaviour appears to be chaotic. ...
The bloodiest single day of battle was Antietam (26,134 casualties). The bloodiest battle, however - which lasted three days - was Gettysburg (51,112 casualties). July 21, 1861.
For the Americans, 610,000 men were involved in the battle, of whom 89,000 were casualties, including up to 19,000 killed. It was the largest and bloodiest battle fought by the United States in World War II.