 Testing was not complete before the beginning of Gulf War in 1990 therefore Marine Air Control Squadron 2 utilized MTDS when combat operations commenced in January 1991.Fielding of the AN/TYQ-23 began shortly after the end of the Gulf War and MTDS was concurrently removed from the Marine Corps inventory.The first MTDS system fielded to the Fleet Marine Force was given to Marine Air Control Squadron 4 at Marine Corps Base Camp Pendleton, California in September 1966.