_Brassards_ worn on the right upper arm are of the following distinctive colors: _blue_ for agents and signalmen, _green_ for guides and scouts, _red_ for orderlies and messengers, _white_ for trench cleaners, _yellow_ for members of parties carrying munitions, material, food or water, _khaki with the word “Salvage” in red letters_ for members of salvage parties, and _blue with the letters “M. P.” outlined in white thread_ for members of the Military Police. _Field Clerk’s Brassard._—Field clerks of Engineers wear upon the left arm above the elbow a brassard of maroon colored cloth with white edges. _Service Stripes._—All enlisted men of the Army who have served one or more enlistments in the Army, Navy or Marine Corps wear one stripe for each such enlistment on each sleeve of the dress coat midway between the wrist and the elbow. These service stripes are three-eighths of an inch in width and are placed diagonally across the outside of the sleeve. The color of the stripe is that of the branch of the service in which the enlistment that it represents was served, as follows: Cavalry, yellow. Artillery, scarlet. Engineers, scarlet piped with white. Infantry, white. Hospital Corps, maroon piped with white. Ordnance, black piped with scarlet. Signal Corps, orange piped with white. Quartermaster Corps, buff. Service School Detachment, green. Service Detachment, Military Academy, green piped with white. U. S. Navy, scarlet piped with yellow. U. S. Marine Corps, yellow piped with scarlet. _Buttons._—The buttons worn by enlisted men of the Army on the dress coat are of gilt metal and bear the coat of arms of the United States in relief; those worn on the service coats are of the same size and design but are made of dull finish bronze metal, and those worn on the overcoat are large bronze flat buttons of the same design. _Identification Tag._—Each officer and enlisted man of the U. S. Army is required to wear two aluminum identification tags about the size of a silver half dollar whenever the field kit is worn, one tag to be suspended from the neck underneath the clothing by a cord or thong of leather passed through a hole in the tag, the second tag being suspended from the first one by a cord or thong. Each tag bears stamped upon it the name, rank, company, regiment and corps of the wearer. This tag is for use in identifying the wearer in case of death or serious wounds. In case of death one tag is buried with the body and the duplicate is kept with the record of the place of burial and the cause and date of death. [Illustration: U. S. Army. Aviation Corps Insignia 1. Aviator (Regular aviators have a silver star above the shield. Junior and Reserve aviators have no star) 2. Observer 3. Enlisted Aviator 4. Aviation Mechanic 5. Other enlisted men] [Illustration: U. S. Army. Enlisted men’s insignia worn on collars of service coats 1. All enlisted men, right side of collar 2. Cavalry