High Quality Content by WIKIPEDIA articles! The structure of U.S. ranks has its roots in British military traditions. At the start of the American Revolutionary War, uniforms, let alone insignia, were barely affordable and recognition of ranks in the field was problematic. To solve this, Gen. George Washington wrote: "As the Continental Army has unfortunately no uniforms, and consequently many inconveniences must arise from not being able to distinguish the commissioned officers from the privates, it is desired that some badge of distinction be immediately provided; for instance that the field officers may have red or pink colored cockades in their hats, the captains yellow or buff, and the subalterns green."