421st TFSq Danang AB RVN

The **421st Tactical Fighter Squadron (421st TFSq)** was a United States Air Force unit that operated out of Da Nang Air Base, Republic of Vietnam, during the Vietnam War. Reactivated and deployed to Southeast Asia, the squadron flew the F-4 Phantom II, providing crucial air support, interdiction, and combat air patrol missions from 1972. The 421st TFSq participated in major operations such as Linebacker and Linebacker II, contributing significantly to air superiority and ground attack efforts. The unit distinguished itself through its effectiveness and adaptability in combat operations until its redeployment following the U.S. withdrawal from Vietnam.