A Joint Terminal Attack Controller embedded with Japan’s Amphibious Rapid Deployment Brigade as U.S. Marines teamed up with the ARDB to conduct an amphibious assault on Gaja-Jima, a small uninhabited island off the coast of mainland Japan, as part of Keen Sword, Nov. 1. - A Joint Terminal Attack Controller embedded with Japan’s Amphibious Rapid Deployment Brigade as U.S. Marines teamed up with the ARDB to conduct an amphibious assault on Gaja-Jima, a small uninhabited island off the coast of mainland Japan, as part of Keen Sword, Nov. 1.