I took philadelphia from America ages ago, and now America has started a war against a CS. The war has been dragging on because for some reason the AI is sending crossbows and knights against a modern era CS, so they obviously cant damage the city (I think the AI+ mod im using broke the AI). I just checked Philadelphia and its getting -9 amenities from war weariness. All my other cities are at 0 amenities due to war weariness. The only explanation i can think of is that the game is assigning war weariness penalties because the city was originally owned by America... Is this how its supposed to work?