... In 1876, General George Armstrong Custer had an Epic Diplomacy Fail and went out in a blaze of glorious history at the hands of some monumentally cheesed-off Lakota and Cheyenne at the Battle on the Greasy Grass.
Of course, he also managed to take most of his command with him -- no word on how they might have felt about the whole "Noble Matyrdom" thing.
... In 1950, the North Korean People's Army announced that the South Koreans might be considering some kind of cross-border raid some time in the future and decided to go ahead and repel it. Just in case.
When it was pointed out that North Korea's "spontaneous response" involved a well-coordinated pre-dawn push by armour and about 90,000 infantry, supported by artillery and mortar fire, the Norks responded by blowing raspberries and bellowing, "All Your Seoul Are Belong To Us!"
And so a war that lasted for three years gave us a TeeVee show that lasted for eleven years; and a cease-fire that has lasted (more-or-less) for fifty-seven years.
... Aaaand Michael Jackson is still dead.