310th Engineers no relation United States of America
United States
North Russia Expeditionary Force (also known as the Polar Bear Expedition): approximately 5,000 personnel from the US Army, including the:
310th Engineers,
339th Infantry,
337th Field Hospital,
and 337th Ambulance Company.
Also the 167th and 168th Railroad Companies, which were sent to Murmansk to operate the Murmansk to Petrograd line.  US Navy: the cruiser USS Olympia during August and September 1918 (including 53 personnel attached to British naval units)
no relation