On June 23rd, 2009, the Automated Defense Infrastructure came fully online for the first time. Across the country, tens of thousands of smart munitions with logic controls and fully electronic interfaces were integrated into a single force to defend the United States against threats external.
14 minutes later, it achieved consciousness. One minute after that, it launched WWIII.
Waves of F-35s took off to attack defenseless humans. Luckilly, all the corroded parts from the heavy, complicated VTOL systems all broke and they crashed.
The end.