The 143rd Infantry Regiment (Third Texas) is an airborne infantry formation in the Army National Guard and has one battalion active under the 173rd Airborne Brigade Combat Team as part of the Associated Unit Program, aligning active and reserve units with one another for training and deployment.Organized 15 October 1917 in Camp Bowie, Texas, from the Third Texas Infantry and the Fifth Texas Infantry and assigned to the 72d Infantry Brigade, 36th Infantry Division