Japan's Ground Self-Defense Force underwent its biggest organizational shake-up Tuesday, in the midst of a challenging security environment, with its command streamlined for flexible operations nationwide and the creation of amphibious forces tasked with defending remote islands.The launch of the Ground Component Command to provide unified command over regional armies and the Amphibious Rapid Deployment Brigade, Japan's version of the U.S. Marines, came as Tokyo seeks to beef up its defenses against North Korea's nuclear and missile programs and China's maritime assertiveness."We are expect…READ FULL ARTICLE