200122-M-ZN327-0214 CAMP PENDLETON, Calif. (Jan 22, 2020) Japan Ground Self-Defense Force soldiers with Amphibious Rapid Deployment Brigade enter the Pacific Ocean at the start of a reconnaissance training mission during of Exercise Iron Fist 2020 on Marine Corps Base Camp Pendleton, California, Jan. 22, 2020. Iron Fist enhances opportunities for the Japan Ground Self-Defense Force and the U.S. Marine Corps to share expertise in the use of amphibious vehicles, combined arms and amphibious doctrine. (U.S. Marine Corps photo by Lance Cpl. Britany Rowlett/Released)