U.S. Army Military District of Washington, A-1-268

Description/Blazon
On a Blue oval 2 7/8 inches (7.30 cm) in diameter with a 3/16 inch (.48 cm) Red border fimbriated White, issuing from a Green mound in base fimbriated Argent, the Washington Monument of the last superimposed by a Red double handed sword bendwise, fimbriated White, hilt and pommel Gold; all fimbriations 1/32 inch (.08 cm).
Symbolism
The functions of the organization are indicated by the double handed sword, symbolic of protection, over the Washington Monument, representing the area concerned. The blue represents the Navy and the Infantry; the scarlet the Field Artillery, Coast Artillery and Engineers; and the green and gold the Military Police.
Background
The shoulder sleeve insignia was originally approved for the Military District of Washington on 26 September 1942. It was redesignated for the United States Army Military District of Washington on 21 July 1971.

(TIOH Drawing Number A-1-268)

Subdued, Olive Drab, NSN: 8455-00-126-2566
  
Information & Plaques Courtesy of The Institute of Heraldry!!