[Jueqelyl]

I think you are not taking modern procurement times into account. Even allowing for the current programs having a lot of waste and uneeded delay, a major weapon system is going to require in the neighborhood of a decade in development before fielding. If its something like a ship or an aircraft it could be years more before it is at a level for substantial untilization.

There is no such thing as liberty ships or having your car factories churning out tanks after a few months of retooling.