Just weeks after US President Donald Trump and Chinese President Xi Jinping invoked their countries’ World War II alliance at the White House, Keen Sword 27 turned symbolism into hardware. The 11-day exercise, which wrapped up on October 29, deployed US Marine NMESIS anti-ship launchers and MADIS air-defence systems to Yonaguni – Japan’s westernmost island, just 110km (70 miles) from Taiwan.