The content originally appeared on: CNN Seoul, South Korea (CNN)Australian sailors will soon begin training on the United Kingdom's nuclear-powered submarines as the defense relationship between Britain, Australia and the United States deepens under the AUKUS agreement, the British government announced Wednesday. 'Today is a significant milestone in the UK and Australia's preparation to confront growing threats to the liberal democratic order, especially in the Indo-Pacific,' Defense Secretary Ben Wallace said as the Royal Navy commissioned its newest attack submarine, […]