 The F-100s were aging and clearly unsuited to the most pressing operational responsibilities in the event of an attack by the North Koreans.In addition, the F-100's were slow in attaining altitude and lacked an effective all-weather, air-to-air combat capability, essential in Korea.Consequently, the 354th transitioned from the F-100s of the ANG to F-4E Phantoms deploying from CONUS-based Regular USAF units.