lot of 1960s Vietnam vintage, US Army field manuals, combat, drill and map reading

Collection of three vintage Vietnam War era, United States Army field manuals. There are: "Combatives - FM 21-150" (1969); "Drill and Ceremonies - FM 22-5" (1966) and "Map Reading FM 21-26" (1965). These army field manuals are profusely illustrated with sections on maps, hand to hand combat with bayonet and knives, rifle drill and more.