In 1917, this unofficial uniform became official and as with the Marine custom, brown shoes were worn. Thus aviators became \ufffdBrown Shoes' and everybody else in the Navy a lowly \ufffdBlack Shoe.' It quickly was recognized the khaki uniform was best for summer, and inappropriate for winter wear. Thus the \ufffdAviation Greens' came into existence. The color was defined as Marine Corps Forest Green and the design the same as the Navy blue uniform.
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