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 Gettysburg in 1863 was the bloodiest battle fought on American soil. In three days 5,662 soldiers were confirmed killed, 10,584 were missing, and 27,203 were wounded. As mentioned, the Civil War was the bloodiest for Americans. More Americans died in that war than in all of its other wars combined.