Philippine military upgrade but no mutual defence: pros and cons of Manila-Tokyo deal / Philippine forces retake an island in mock combat as China's navy watches / Philippine military steps up security, loyalty protocols to prevent data leaks to adversaries / Watch: Chinese coast guard clashes with Filipino navy / Watch: Chinese sailors attack Philippines navy ship with knives, sticks / Filipino soldiers fight off 'armed' Chinese coastguard with 'bare hands' / Filipino soldiers fought off Chinese coast guard 'with bare hands'