I've been attacked by armies with 500-600 attack boost (my city defense is 143 with 49 attack) and I wonder if it's actually possible to build a city defense capable to repelling those. Looking for city defense boosts, I find very few ... Castel del Monte, special evetn buildings, etc. and I'm beginning to suspect that it's impossible to build a successful city defense, to encourage attacks. I've ceased building a city defense army and let the 2 spear throwers have their day. If my thinking is incorrect, I'd like to know.