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 the bloodiest day in American military history. On the Union side, casualties included more than 2,100 killed, 9,500 wounded and 750 missing or captured. The Confederate count was more than 1,500 killed, 7,700 wounded and 1,000 missing or captured.