page_title: 42nd Electronic Combat Squadron
section_title: Vietnam War
hierarchical_section_title: 42nd Electronic Combat Squadron / History / Vietnam War
caption_attribution_description: English: Douglas EB-66E Destroyer in flight. Aircraft of the 355th Tactical Fighter Wing, 41st or 42nd TEWS based at Takhli Royal Thai Air Force Base over Southeast Asia on 30 March 1970.
context_page_description: The 42d Electronic Combat Squadron is a United States Air Force unit. Its current assignment is with the 55th Electronic Combat Group at Davis–Monthan Air Force Base, Arizona as a geographically separated unit from its parent wing, the 55th Wing at Offutt Air Force Base, Nebraska. The squadron is the Air Force's sole Lockheed EC-130H Compass Call formal training unit.
context_section_description: Reactivated in 1968 at Takhli Royal Thai Air Base under the 355th Tactical Fighter Wing.  The squadron carried out electronic warfare operations over North Vietnam, locating and identifying North Vietnamese radar sites that directed missiles and AAA fire, so that strike aircraft could avoid them. The RB-66C had no offensive capability, so it could not attack the radar sites directly. Squadron was transferred to Korat Royal Thai Air Force Base in August 1970.  Continued operations until the end of hostilities in January 1973, remained in Thailand until being inactivated in March 1974.
caption: Douglas EB-66E Destroyer in flight in 1970[note 3]
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