Share This Article 1. This was the codename for America’s plan to invade mainland Japan Downfall Thunderbolt Showboat Guardian 2. This was the NATO reporting name for the Mikoyan-Gurevich MiG-19. Farmer Fencer Flitter Foxbat 3. In 1908, the University of Oklahoma adopted this nickname for its football team. “Sooners” “Rough Riders” “Buffalos” “Cherokees” Loading …