Following V-E Day, it served in the occupation forces until returning to the United States, where it was inactivated in December 1945 upon arriving at the Port of Embarkation.

It was inactivated in May 1993, in preparation for the closure of Mather as navigator training was transferred to Randolph Air Force Base, Texas.

It designs and develops engineering systems to improve mission planning and debrief capabilities and analysis products to meet operational requirements.

It updates electronic warfare intelligence data analysis tools and dissemination methods to meet the needs of air force weapon systems.

It provides operational training and test capabilities in a realistic contested, degraded, and operationally-limited (CDO) environment.

The squadron is composed of active duty, reserve, national guard, Department of the Air Force civilians, and contractor personnel.

After Phase I training at MacDill Field, Florida with Martin B-26 Marauders, the squadron trained for combat at Myrtle Beach Bombing Range, South Carolina until late April 1943, when the ground echelon departed Myrtle Beach for England, sailing on the RMS Queen Elizabeth on 5 May.

[1][7] It began operations with Eighth Air Force in July 1943 as part of the first medium altitude raid[c] on the European continent by B-26s.

[5] In preparation for Operation Overlord, the Invasion of Normandy, the 453d attacked coastal defenses and other targets in northwestern France.

The squadron was awarded a Distinguished Unit Citation for striking transportation hubs used by the Wehrmacht to bring reinforcements to the Ardennes during the Battle of the Bulge.

It returned to the United States in November and was inactivated at Camp Myles Standish, Massachusetts, the port of embarkation, a day later.

[17] It was formed from the AF Special Communications Center of Excellence's EW Effectiveness Analysis Mission (Comfy Coat).