The Army is preparing to acquire a small set of humvee-mounted cannon prototypes, setting the stage to potentially replace light-tactical-vehicle-towed big guns with a new class of fast and nimble indirect fires to fight peer competitors like Russia and China. Lawmakers have approved an Army request to immediately shift $10 million between fiscal year 2020 appropriated accounts to buy a few AM General-built Hawkeye Mobile Howitzer Systems -- a 105mm cannon mounted on a two-door cargo truck that is paired...