This device on hat or helmet means U.S. Marines.

This device on hat or helmet means U.S. Marines. LOC Summary: U.S. Marine Corps insignia and hat and helmet with the insignia. LOC Notes: Promotional goal: U.S. J26. 191-. Date Created/Published: 191-. World War 1 recruitment poster provided by LOC. Original medium: 1 print (poster) : color.