421^st Tactical Fighter Squadron – USAF

The unit was originally formed as the 421st Night Fighter Squadron in 1943. After training, it was deployed to Fifth Air Force and ordered to New Guinea to provide air defense interceptor protection against Japanese night air raids on USAAF airfields.

It later served in the Philippines Campaign where in addition to night interceptor missions it also flew day and night interdiction missions against enemy troop movements, bridges and other targets of opportunity.

It later served on Okinawa and in Occupied Japan where it was inactivated in 1947.

It was reactivated by Tactical Air Command in 1962 as the 421st Tactical Fighter Squadron. Equipped with Republic F-105 Thunderchiefs, it deployed to Southeast Asia and engaged in combat operations over North Vietnam.

It returned to the United States and was re-equipped with the McDonnell F-4D Phantom II and returned to Southeast Asia for a second and later third tour of duty in the Vietnam War.

Vietnam War

The requirements of the Vietnam War led to the 421st to change its mission from nuclear weapons delivery to that of being a tactical bomber over North Vietnam. From April 1966 to April 1967 the 421st was stationed at Korat Royal Thai Air Force Base, Thailand, with the 388th Tactical Fighter Wing. For the next two years, the squadron was stationed with three different stateside wings, though in name only.

On 23 April 1969, the 421 TFS was on deployment to DaNang AB, Republic of Vietnam, when they received an order while at Hickam AFB in Hawaii, to redeploy to Kunsan AB, Korea due to the downing of a Navy EC 121 on April 15, 1969 Kunsan Air Base,

They arrived in Kunsan with their factory fresh McDonnell Douglas F-4E Phantom IIs. Their mission was air defense following the downing of a Navy EC 121 off the coast of North Korea. An F 100D Air Guard squadron from the US relieved the 421st On 21 June 1969, and they transferred to DaNang AB, Republic of Vietnam to resume their originally scheduled mission and remained there through October 1972, flying 15,420 combat missions in the F-4D. On 31 October 1972, the unit moved to Udorn Royal Thai Air Force Base, Thailand, with the 432d Tactical Reconnaissance Wing.

At Udorn, the squadron was briefly re-equipped with the RF-4C reconnaissance version of the Phantom, before being equipped with the F-4E, the last and most advanced version of the Phantom to fly in Southeast Asia. Combat missions continued in Southeast Asia until the cease-fire on 28 January 1973, in Laos until February 1973, and in Cambodia until 15 August 1973.

The squadron then changed to a training environment and participated in many tactical air exercises. During April 1975, squadron pilots participated in the evacuation of Phnom Penh, Cambodia and Saigon, Republic of Vietnam. In May 1975, the squadron flew in tactical missions associated with the recovery of the SS Mayagüez and its crew.

For its efforts in Southeast Asia, the 421st earned three Presidential Unit Citations, six Air Force Outstanding Unit Awards with Combat "V" Devices, the Republic of Vietnam Gallantry Cross with Palm, and flies 12 campaign streamers for Southeast Asian dut