 The 64th was actually an Air Defense Command unit from Paine Field, Washington which had been deployed to Clark to provide air defense over several major USAF bases in South Vietnam.The mission of the 366th at Da Nang was to support "Operation Rolling Thunder"; the tactical bombing of enemy targets in North Vietnam by destroying any North Vietnamese Aircraft that would attack the F-105 Thunderchief fighter-bombers carrying out tactical bombing missions.On a typical mission over the North, the F-4Cs from the 366th would carry four AIM-7D/E Sparrows, four AIM-9B/D Sidewinders, and a load of eight 750-pound bombs for bombing operations.