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Fealty: Transfer Cities to Allies

Allows exchanging cities with Players using a modified Peace Deal city transfer screen. As in that screen, the AI can calculate the value of each respective city, so you can trade cities both ways. As a UI screen, this can be installed mid play-through.

There is a setting you can do when setting up a game to make it for Allies only, Human players only, or unrestricted.

Note: A known issue in the game means if you lose a city that a trade route paths through, you also lose the trade route. This occurs even without my mod on, but is important to consider when thinking of settlements to trade.