The Houston Light Guard was one of the oldest militia companies founded in Texas. Founded in 1873, it served as Company G of the 143rd Infantry Regiment during both World Wars and later as A co 2nd Battalion, 143rd Infantry after the Pentomic division system. It was a part of the National Guard's only Airborne Infantry Brigades, was a Ranger Company, and a Long Range Surveillance Company. The Houston Light Guard moniker is an official US Army special designation.