Uniform of the Union Army letters US. Officers, NCOs and cavalry troopers were equipped with a sword belt with a rectangular buckle with eagle motif. Rank was displayed on epaulettes (dress occasions) or shoulder straps(field duties): no insignia for a second lieutenant, one gold bar for a first lieutenant, two gold bars for a captain, a gold oak leaf for a major, a silver oak leaf for a lieutenant colonel, a silver eagle for a colonel and one, two or three silver stars for a general, depending on his seniority. The color of the shoulder strap fields – with trims in gold braid – were
United States Army enlisted rank insignia worn. The new combination Army Service Uniform (ASU) is dual-purpose, consisting of a dark-blue jacket, white dress shirt, and blue trousers (or an optional dark-blue skirt for female personnel). The jacket has epaulettes for enlisted men and non-commissioned officers, and shoulder straps for warrant officers and officers. Non-commissioned, warrant, and commissioned officers' trousers have a wide yellow stripe down the outside of each trouser leg. There are dark-blue cloth sliders with embroidered yellow or white rank-insignia on the Class "B" dress shirt epaulettes. It is a service uniform when worn with a dark-blue necktie; it is a Class "A" uniform