The 89th Attack Squadron mission is to remotely employ General Atomics MQ-9 Reaper aircraft from ground control facilities located at Ellsworth Air Force Base to support combatant commander requirements around the world.

The squadron moved to the Aviation Concentration Center at Camp Mills, Garden City, New York in October to prepare for overseas movement.

[6] The squadron was assigned the first pilots to arrive at Chatillon and began training observers in artillery adjustment, photography, and gunnery.

[2] The squadron was activated and assigned to General Headquarters Air Force at March Field, California, but was attached to the 17th Bombardment Group.

[12] The 89th moved to Lexington County Airport, South Carolina in early 1942 to perform antisubmarine patrols over southeast Atlantic coast and the Gulf of Mexico.

[2] Planning for a retaliatory bombing raid on Japan began in December 1941, and twenty-four B-25Bs were diverted from the 17th Bombardment Group, which was the only B-25 unit in the Air Corps, and volunteers from its four squadrons, including the 89th, were recruited, the crews being told only that this was a secret and dangerous mission.

Upon completion of training, they left Eglin for McClellan Field, California for final modifications to the B-25s before moving to Naval Air Station Alameda, where the bombers were loaded on the USS Hornet (CV-8) for the raid.

[9] In November 1942, the squadron deployed to North Africa, arriving at Telergma Airport, Algeria in December 1942 following Operation Torch's initial landings, becoming part of XII Bomber Command.

The squadron flew interdiction and close air support, bombing bridges, rail lines, marshalling yards, harbors, shipping, gun emplacements, troop concentrations and other enemy targets in Algeria and later Tunisia supporting American and later Allied ground forces as they moved east and participated in the Tunisian Campaign.

From airfields in Corsica, the 432d supported Allied ground forces during Operation Dragoon, the invasion of southern France in August 1944.

It earned a second Distinguished Unit Citation for bombing attacks on enemy defenses near Schweinfurt, Germany just before the end of the war on 10 April 1945.

[16] In March 2019, the squadron was reassigned to the 25th Attack Group, located at Shaw Air Force Base, South Carolina.

That year, the squadron provided protection to American and coalition forces across multiple combatant commands and other Department of Defense and government organizations.