I see Marines both wear blue and white pants for full dress uniforms. In which case they use which? : r uniformporn These personnel from Company H, 2nd Headquarter Battalion, wear the various regulation uniforms. From left to right, the winter service uniform worn by an M.P., the summer dress uniform, the winter service Marine Corps Uniform Regulations: Tips & Advice for Appropriate Wear USAMM WWI USMC MARINE WINTER DRESS TUNIC UNIFORM INDIEN PATCH #45233462 Marine Corps Alpha Dress Uniform Set Jacket 42 Reg Trousers 35 Long eBay Uniforms of the United States Marine Corps Wikipedia