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
Air force officer rank insignia military. While countries outside the NATO command structure (including some NATO member countries such as France) do not strictly fall into this classification structure and there may be instances of overlap the codes still provide a useful gauge in determining what ranks are broadly equivalent. Note that the NATO officer rank codes (OF-1 to OF-10) are differently numbered from the US officer rank codes (O-1 to O-11). Air force officer rank insignia To assist in the comparison of different countries' air force officer rank insignia, NATO rank codes have been used. These are established codes for determining the seniority of