Field dress during this period was either the Army Tropical Uniform, or the M wool field uniform. Service departments Department of Defense Secretary: The First Troop Philadelphia City Cavalry a Pennsylvania National Guard unit has a special full-dress uniform known for its distinctive helmet with extravagant bearskin roach. This uniform was descended from the tropical combat uniform of the Vietnam War and consisted of a coat made of a nylon and cotton blend in woodland pattern camouflage with matching trousers, and a field cap. Between and the Army introduced a staggering variety of rank, branch and specialist insignia in either bright colors for full dress and drab or bronze colors for the field, far more than we can deal with in this study. The black tie was replaced with a khaki tie made of mohair, tropical worsted or other khaki material without sheen or pattern. Army personnel assigned to those units as instructors may also wear institutionally developed uniforms in lieu of standard army dress.