Walls

I don’t see the problem for very late game stages like the imperial age.

Also the monopoly is not a problem because you have 5 minutes to stop it, and the siege has a lot of range, also the native TP can also lock up and declare a monopoly in the same way.

@RockingCube36 I’ve already talked about it and most agree that gate over route should be possible at least in NR mode.[Poll] Would you like to be able to build doors on the trade route after the imperial era in the standard game, or at least in the treaty mode?