The Navy, preparing for great power conflict, is sending its strongest indication to date that it predicts its future is in unmanned systems. The service's fiscal year 2020 budget request, now under review by Congress, includes more than 200 unmanned systems and takes several steps to more quickly adopt the technology, including accelerating an unmanned surface vessel program slated to cost nearly $3 billion over the next five years. "What they're actually trying to do . . . is make...