We all know everything in history didn't always work perfectly, and we are here to find out which one's didn't work the most. There are two categories to a failure: 1) Something in history (be it a military campaign, an invention, ect.) was working very well, but something went wrong, or someone made a mistake to mess it up. I refer to this as the "Agh! So Close" failure 2) The second, and perhaps most entertaining to watch would be a failure from the start. A complete and utter goof up that leaves heads spinning and historians wondering why they thought it would ever work. I call this the "Oh God what have I done" failure.