When success is really, really bad
Everyone else has been having fun with this, so why not me? According to [p]Resident George W. Chimpster, the biggest problem with the invasion of Iraq was its (wait for it) "catastrophic success".
That's right -- apparently, no one foresaw that the world's largest military superpower could take on a third-world country that had been crippled by 10 years of sanctions, and further crippled by having to publicly destroy even their legal armaments, and kick the living crap out of that poor country in short order. Nope, the speed with which the U.S. overwhelmed the pitifully-equipped Iraqi army came as a complete and total surprise.
Next up: America invades Mozambique. Military leaders gird for long, hard struggle.