The uniform for the officers of the Marine Corps Branch of the Naval Militia of the several states and territories is the same as that for the officers of the regular service with the addition of a distinctive mark showing the state or territory to which they belong. This distinctive mark is the authorized abbreviation for the state or territory in metal block letters one-half of an inch high and is worn in rear of the Marine Corps device on each side of the collar of the blue undress, white undress, summer field and winter field coats, on the shoulder straps of the overcoat and on the front of the field hat, gold for the undress coats and bronze for the field coats, overcoat and field hat. When sworn into the service of the United States the Naval Militia becomes a part of the National Naval Volunteers and the officers wear a metal letter V in place of the state or territory letters described above. Officers of the Marine Corps Reserve wear the same uniforms as the officers of the regular service with the addition of a letter R worn as prescribed for the state letters of the Marine officers of the Naval Militia organizations. UNIFORMS OF THE ENLISTED MEN OF THE MARINE CORPS The enlisted men of the Marine Corps are required to have complete outfits of dress uniform, summer field uniform, winter field uniform and an overcoat. The occasions upon which the different uniforms are worn is as stated in the table of occasions for the uniforms of enlisted men of the Navy and Marine Corps on page 133. The different uniforms are as follows: