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.
This Day in History: 09/17/1862 - Battle of Antietam. In this This Day in History video, Robert E. Lee's bloody Civil War battle of Antietam is discussed. It occurred on 9/17/1862 and is considered the bloodiest one day battle in U.S. History.