In the United States Marine Corps, these caps are also worn, in two forms. For all ranks, the device is the Eagle, Globe, and Anchor device. In addition, officers wear a lace cross on the top, called the quatrefoil, a traditional mark of distinction from the Marine Corps' foundation enabling sharpshooters aboard ships to identify friendly officers from foes. For blue dress uniforms, the cap is white with a gold device for enlisted, while the gold and silver device is for officers. Only the visor is black, and the chin strap is black for enlisted Marines; it is gold and scarlet for officers. For the service uniforms, an olive drab combination cap is available; the device is black, and the chin strap is black for all ranks. In both cases, field grade officers (majors, lieutenant colonels and colonels) have gold oak leaf motifs on the visor, similar to those worn by navy commanders and captains, while general officers' caps have a different, larger oak leaf motif on the visor. Additionally the blue dress cap of the Commandant of the Marine Corps (as well as the Chairman of the Joint Chiefs of Staff if it is also a Marine) adds an additional gold oak leaf motif to the front of the band. In the Marine Corps, the combination cap is referred to as the "barracks cover." Also referred as the dress cap or service cap in Marine Corps Orders.