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Fortress Borders

This mod adds cultural borders to fortresses expanded one tile away. This mod will allow you to claim resources or expand your borders without building cities you don't want to have. You can also now support battle lines far outside of your territory, by building a fortress to protect a pass or strategic point.

Features:
- Once built, a fort tile and all adjacent tiles will belong to the player who built it
- If a fort is unoccupied for 5 turns, the land will return to nature as long as it is not within 5 plots of a city.
- If a fort has been unoccupied and lost ownership, any player can occupy it by placing a unit inside.
- If a fort is ever occupied by an enemy unit, the enemy player will gain control of the fort and land around it.
- Forts now cost 1 gold per turn to maintain.

Future features:
- Citadels will have borders expanded up to two tiles away.
- A fort built near or in enemy territory will expand borders only if there is no enemy fort nearby.


Patch Notes

Patch 1:
- Citadels will now have cultural borders as well
- A fort built near friendly territory will not expand borders into that friendly territory.

Patch 2:
- Fixed a bug where forts were not expanding borders on some versions of Civ

Patch 3:
- Set fort cost per turn to 3g
- Set Citadel cost per turn to 5g