A Marine SGT. is dressed in a military police (MP) winter uniform. He is wearing dress blue trousers, a brown jacket, a white barracks cap, a police badge, an MP arm band A colorized photo of a US Marine in Blue Dress uniform, circa 1917 : r USMC Formal winter dress uniform, Air Force officer PICRYL Public Domain Media Search Engine Public Domain Search U.S. MARINE CORPS UNIFORMS QUICK REFERENCE VISUAL GUIDE Changes to the Marine Corps uniform policy have been NARA & DVIDS Public Domain Archive Public Domain Search