Yamato matters because every government feels compelled to answer its 18-inch guns, regardless of how well the weapons would perform in battle. Britain and the United States can first adapt existing designs, possibly with twelve 16- or 16.5-inch guns, before pursuing their own larger status ships. Hitler, Mussolini, and Stalin face stronger personal incentives to demand spectacular capital ships regardless of fleet balance. In Germany especially, money and scarce materials diverted to an ego-driven super-battleship can displace submarines, destroyers, cruisers, and the infrastructure Plan Z needs. Gun caliber becomes a lesson in signaling, dictatorship, and procurement opportunity cost.
Notable Point · 25:34-31:47
Yamato's 18-inch guns distort every rival building program
Disclosure of Japan's 18-inch armament produces quick Allied counters, later prestige ships, and damaging budget pressure inside less balanced navies.