Troop ordered into active military service 15 December 1942 and reorganized at Camp Howze, Texas, as the 86th Cavalry Reconnaissance Troop, an element of the 86th Infantry Division.
The troops were activated for combat duty on 15 December 1942 and subsequently reorganized at Camp Howze, Texas, to form the 86th Cavalry Reconnaissance Troop, part of the 86th Infantry Division.