horse soldier, 1776-1943 : the United States cavalryman : his uniforms, arms, accoutrements, and equipments / by Randy Steffen ; illustrations by Randy Steffen Mortier, Amerikaans model M1, met affuit M4 en grondplaat , kaliber 81 mm, voor exercitie Mortier, Amerikaans model M1, met affuit M4 en grondplaat, kaliber 81 mm This is armor - United States Department of the Army Pamphlet No. 360-2