Redbeard
Banned
Actually I think the battleship was quite well armoured against the SSM. The SSM would typically cause great damage to anything outside the armoured citadel and turrets/barbettes but would have big difficulties in treaching the vitals behind armour. The battleship was very vulnerable to underwater explosions (torpedoes/mines) as was/is any ship.You need the guide missile not to be developed. Just can't really armor against these weapons. The BB was armored against gun fire at very specific ranges. When you have to armor against gun fire and missiles, you can't do it and have the ship float. And then missiles are better weapons than guns. Longer range, can be carried by cheaper things (planes, smaller boats, subs).
Thye battleship became obsolete not because it was vulnerable but because you for the same buck could pack a bigger bang in the aircraft carrier and SSM carrying vessels - and because there hasn't between any conflict between equally advanced naval forces since the early 1940s - which probably would have shown the extreme vulnerability of the aircraft carrier.