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.
The Battle of Antietam was one of the most important events of the American Civil War. Fought on September 17, 1862, Antietam was the bloodiest single day battle in American history, with over 23,000 casualties (men listed as killed, wounded, or captured/missing) in roughly 12 hours.