The 414th Combat Training Squadron (414 CTS) is a United States Air Force unit assigned to the 57th Wing at Nellis Air Force Base, Nevada. The 414th is a non-flying organization charged with hosting Red Flag exercises, Air Combat Command's largest Large Force Exercise (LFE). It was reactivated as the 414th Fighter Weapons Squadron at Nellis in 1969, serving in that role until inactivated in 1983. It was activated again at Nellis in 1991 as the 414th composite Training Squadron. In 2005, it became a non-flying squadron managing Red Flag exercises.