Right, I'd actually skip IW if going straight for catapults, though in my test game with Tokugawa, I also had 2 jungle gems so I did IW > Construction.
With catapults you can use any units to attack with, and mixed stacks of axes and spears will generally fare better than swords because they are much more resistant to attacks.
With catapults you can use any units to attack with, and mixed stacks of axes and spears will generally fare better than swords because they are much more resistant to attacks.