The War Zone – concept for an unprecedently large diesel-electric drone submarine, as big as some crewed types in service today, has emerged from China’s top state-run shipbuilding conglomerate. The design is said to be reconfigurable to conduct different missions, including attacks on enemy vessels, mine-laying, special operations support, and act as a mothership for smaller uncrewed underwater vehicles (UUV). There is a very strong possibility this is related to an extremely similar-looking mystery submarine that emerged in China six years ago.