Marine Uniforms New and Surplus Gear Army Surplus World My current progress on my USMC Dress Blue MP uniform setup. : r Militariacollecting Dress Blues Explained The Dress Blue uniform, worn by Marines, is steeped in history, with roots dating back to 1798 when the secretary of war authorized the wearing of a blue uniform Blue Dress USMC Uniform Guide US Marine Corps uniform evolution Hilton Head Island Packet USMC Dress Blue Uniform WWII Impressions, Inc.