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.
Bloodiest single day of battle in the Civil War. Gen. McClellan had found a copy of Gen Lees battle plan that he left at a abandoned Confederate camp and learns that Lee had divided his army so McClellan and Gen Lee met on the Antietam Creek which was the single bloodiest battle in US history.