So i am not sure if it is intended, and i know it was mentioned somewhere, the defending army stationed in a city only fights in the first battle in a turn. Any other attack the same very turn, and defense does not show up. It is easily exploited (i know always carry on with my major army 1-turn garbage unit to do first attack and die in glory, whereas my main army attack defense-free city), and it kind of undermines defense investing.
