• Vietnam War
• United States Navy
• F-4B - Two-seat all-weather carrier-based fighter and ground-attack aircraft for the US Navy and Marine Corps. 649 built.
  
• F-4J - Improved F-4B version for US Navy and Marine Corps, larger main landing gear wheels resulting in wing bulges similar to F-4C. 522 built.
• F-4C - Two-seat all-weather tactical fighter, ground-attack version for the United States Air Force; supported AIM-4 Falcon, AGM-12 Bullpup, and nuclear weapons; wider main wheel tires resulted in distinctive wing bulges; duplicated flight controls in the rear cockpit. 583 built.
• F-4D - Improved F-4C version for the United States Air Force. 825 built.
• F-4E - USAF version with an integral M61 Vulcan cannon in the elongated RF-4C nose,  Starting with Block 53, aircraft added AGM-65 Maverick capability. 1,370 built.

Fighter Squadron 114 (VF-114) - a fighter squadron of the United States Navy [1945~1993]. Nicknamed "Aardvarks", flew combat missions during the Korean War and Vietnam War (Between 1963 and 1975, VF-114 made nine cruises to Vietnam and the Western Pacific, all aboard the USS Kitty Hawk).