Personally, I think it's set in the campaign data files. I think a province will be pre-specified as to its ability to build fortifications. I don't think it's changeable later in the game no matter the development of the province.
Personally, I think it's set in the campaign data files. I think a province will be pre-specified as to its ability to build fortifications. I don't think it's changeable later in the game no matter the development of the province.
Age and treachery will defeat youth and skill every time.
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