How to increase city strength?
What factors can increase or decrease the combat strength of a city (both standard and ranged strength)?
Known methods,
- Building walls in the city.
- Having a garrisoned unit.
- Applying the Bastions policy card.
If there are expansion specific methods I would be pleased to know those as well.
Solution 1:
Between the wiki and a civfanatics post here's what I gathered,
- Era: Each era has a base city strength Ancient being around 10 and Modern being somewhere around 50-60.
- Terrain: Just like in Civilization 5, being constructed on a hill provides additional combat strength for the city. Additionally, settling on a river can increase city combat strength.
- Population: More population means more city strength.
- Buildings: Walls, Castles, Arsenals, and Military Bases all increase the city's combat strength.
- Garrison: A land unit in the city will increase the city's combat strength.
- Districts: Each district contributes to the city's combat strength.
- Palace: The capital's Palace increases city combat strength.
- City-States: If the city is a city-state, the most number of envoys (up to 6) by a single player contributes to the city-state's combat strength.
- Difficulty: The difficulty level you are playing on can also contribute to a city's combat strength.
Solution 2:
In addition to the above, the Castellon governor Victor in the Rise and Fall expansion provides
- +5 combat strength once established in a city
- an additional Ranged Strike per turn as a promotion