Original U.S. WWI US Navy Gunners Mate Service Dress Blue Uniform Set International Military Antiques 19th century Professional women navy dress uniforms Dress blues are the formal uniform worn by U.S. Marines for ceremonial occasions, official functions, and formal events, featuring distinctive dark blue coats, light blue trousers, white belts, and medals or ribbons Army releases message announcing new service uniform Article The United States Army In honor of #Navy250, we're looking at how uniforms have evolved. From the dress coats of the War of 1812 to today's modern dress blues, the Navy's tradition of professionalism endures.