U.S. Marines operate field radio set ... Practice in flashing messages from point to point through the use of the field "wireless" or "radio: has caused the U.S. Marines to become experts in this method of conveying orders in wartime. Every modern method of signaling is known and used by the "Soldiers of the Sea." Their latest S-O-S call is for more men - why don't you answer it? ... This photo furnished by U.S. Marine Corps recruiting office
Creator
United States. Marine Corps. Recruiting Publicity Bureau
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