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.
Making the world better, one answer at a time. Gettysburg was the bloodiest and the fighting took place over three days with over 50 thousand casualties. The bloodiest single day battle was at Sharpsburg, Maryland at Antietam creek and had over 25k casualties. The term casualties meaning killed, wounded, MIA or POW.