A field radio operator assigned to the Western Army Infantry Regiment, Japan Ground Self Defense Force, relays orders to his squad, during a live-fire platoon level assault during Exercise Iron Fist 2016 aboard Marine Corps Air Ground Combat Center Twentynine Palms, Feb. 9, 2016. Iron Fist is an annual, bi-lateral training exercise between the Japan Ground Self Defense Force and Marines to strengthen warfighting capabilities in ship to shore operations. - A field radio operator assigned to the Western Army Infantry Regiment, Japan Ground Self Defense Force, relays orders to his squad, during a live-fire platoon level assault during Exercise Iron Fist 2016 aboard Marine Corps Air Ground Combat Center Twentynine Palms, Feb. 9, 2016. Iron Fist is an annual, bi-lateral training exercise between the Japan Ground Self Defense Force and Marines to strengthen warfighting capabilities in ship to shore operations.