Likewise in 1968, Headquarters & Headquarters Company, along with Company L, 133rd Infantry, Iowa National Guard based at Sioux City, were also placed on alert and sent into federal service at Fort Carson Colorado following the Pueblo Incident. Although anxious to deploy overseas as a fighting unit, the Iowa Guard troops—like their grandfathers of World War One—were sent to Vietnam piecemeal, as replacement troops. Some members of the Guard, including Military Policemen, deployed to South Korea. At least three Sioux City Guard members were killed in action in Vietnam during the war.