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.
Gettysburg, the bloodiest battle of the Civil War, is usually claimed to have killed 3,155 Union and 3,903 Confederate troops, for a total of 7,058. Deadliest Days in American History: Sept. 8-9, 1900, Galveston Hurricane [Deadliest 24 hours in US history: 8,000]