|4th Electromagnetic Warfare Squadron|
|Branch||United States Space Force|
|Role||Control of Offensive Counterspace Systems|
|Garrison/HQ||Peterson Space Force Base, Colorado, U.S.|
Air Force Outstanding Unit Award
|Lt Col Nicholas R. Shaw|
|4th Space Control Squadron emblem (approved 5 June 1995)[note 1]|
The United States Space Force's 4th Electromagnetic Warfare Squadron (4 EWS) is an offensive space electromagnetic warfare unit formerly located at Holloman Air Force Base, New Mexico, stood up operations July 1, 2014 at Peterson Space Force Base, Colorado.
The 4th Electromagnetic Warfare Squadron is a Space Operations Command unit responsible for delivering offensive counterspace and space situational awareness, as appropriate, to rapidly achieve flexible and versatile effects in support of global and theater campaigns.
The squadron provides combat space superiority effects to the Commander, Combined Force Space Component Command (CFSCC) and theater Combatant Commanders through operation of the Counter Communications System.
The unit initially activated at Lackland Air Force Base, Texas in October 1990 as the 4th Surveillance Squadron, when it replaced Detachment 2, of the 694th Electronic Security Wing and assumed its personnel and equipment.[note 2]
The Low Altitude Space Surveillance system (LASS) was activated by Air Force Space Command in October 1990. The unit was named the 4th Surveillance Squadron. One year later, it was redesignated as the 4th Space Surveillance Squadron. During this time, the unit continued to perform a research and development mission and a mission to train newly assigned LASS operators until April 1993. The 4th SPSS also performed mobile space surveillance communications and space data relay.
The squadron was assigned to the 73d Space Surveillance Group and in April 1995 merged with the 21st Space Wing. In April 1996, the unit moved operations from its home at Lackland AFB, Texas, to Holloman AFB, New Mexico, before relocating to Peterson AFB, Colorado in 2011. The unit was redesignated as the 4th Space Control Squadron in February 2003. The 4th transitioned to a counterspace mission in July 2005, and activated its first Counter Communications System on 11 April 2006.
From late 2002 until May 2003 the squadron deployed 56 members to support Operation Iraqi Freedom to provide data relay and other space communications for theater commanders.
Squadron members deployed to the 379th Expeditionary Operations Support Squadron along with other 21st Space Wing units to support Operation Silent Sentry and the Rapid Attack Identification Detection and Reporting System (RAIDRS) in Southwest Asia. Formerly known as the SATCOM Interference Response System (SIRS), Silent Sentry began simply as a proof of concept but grew into a fully operational system that supported the Combined Air and Space Operations Center's ability to command and control its forces. The system was Air Force Space Command's first deployable defensive counterspace weapon system. Their efforts earned them the 2006 Air Force Association Citation of Honor for "outstanding contribution of an organization to the development of aerospace power for the betterment of mankind."
On 15 April 2022, the 4th Space Control Squadron was redesignated the 4th Electromagnetic Warfare Squadron.