China's Type 100 stunned analysts at Beijing's Victory Day parade last September, an unmanned-turret, hybrid-electric tank built for the drone age. Ten months later it is in service, and the US Army has published a formal assessment of it, crediting its strengths and then detailing exactly where American forces can break it. The twist: the Army is racing to field its own tank on the same architecture, which makes its list of Chinese weaknesses r…