The first patented service uniform in the United States was the Union Army uniform during the American Civil War. The uniform was designed by a quartermaster named Montgomery C. Meigs, who patented it in 1861. The uniform consisted of a dark blue jacket and trousers, a white or light blue shirt, and a kepi hat. The innovative aspect of the design was the use of standardized sizing, which allowed for easier distribution and replacement of uniforms. The uniform also included a variety of functional features, such as reinforced pockets, sleeves, and collars, as well as brass buttons for durability and to denote rank.