_The coat_ is single-breasted, with a rolling collar and notched lapels, closed down the front by a single row of bronze buttons, shaped to the figure, the skirt extending to about ten inches below the waist. On each shoulder there is a shoulder strap sewn into the sleeve shoulder seam and attached at the collar end by a small bronze button. On each breast there is a patch pocket and on each side below the waist a patch pocket of the bellows type, each pocket being closed at the top by a shield shaped flap secured by a small bronze button. Around the waist is sewn a belt of the same material as the coat. The insignia of the Y. M. C. A. are worn upon the cuffs. _The breeches_ are of the same material as the coat and of the same style as those prescribed for officers of the U. S. Army. _The cap_ is of the same style and dimensions as that prescribed for officers of the U. S. Army, and is made of forestry-green cloth with a black mohair band, and visor and chin strap of black patent leather. The insignia of the Y. M. C. A. are worn at the center of the front of the cap. _The field hat_ is of the U. S. Army regulation pattern and color with hat cord of red and blue braided strands. _The overcoat_ is a double-breasted ulster of forestry-green cloth, with two rows of bronze buttons down the front, buttons to the throat and has a stand and fall collar of the same style as the U. S. Army regulation overcoat. On the back at the waist line there are two straps of the same material as the coat let into the side seams and secured together by two bronze buttons. On each side below the waist there is a pocket with a horizontal opening covered by a rectangular flap. The skirts of the overcoat extend to about ten inches below the knee when the wearer is standing. The Y. M. C. A. insignia are worn upon the cuffs. [Illustration: _Photo. by Harris & Ewing, Washington, D. C._ Y. M. C. A. War worker in service uniform] [Illustration: _Photo. by Harris & Ewing, Washington, D. C._ Y. M. C. A. War worker in service dress. Uniform and overcoat] _The insignia of the Y. M. C. A. war workers_ consist of a red equilateral triangle, worn with one of the angles pointing down, and having horizontally across the center of the triangle a rectangular strip of blue upon which are the letters “Y. M. C. A.” in red. These insignia are worn upon the fronts of the caps and upon the outer side of the cuffs of the coat and overcoat sleeves. _The buttons_ are of dark bronze and bear the insignia of the Y. M. C. A. CHAPTER XIV CUSTOMS OF THE SERVICES The rules which govern official and social intercourse among members of the military and naval services are based upon the well established customs which prevail in all walks of life, modified only to such extent as may be required by the peculiar conditions of the services in order to secure the greatest degree of efficiency and discipline.