Does this mod add a new “gate” building or just allow walls to be placed on trade routes ?
In the first case, there is no more space for a new building in the interface of certain european villagers (Dutch).
In the second case, it would be possible to build a wall without a door on a trade route. I think that it’s a bit dangerous for trains xD
In fact, the solution could be: only the “great wall” can be placed on trade routes and that they automatically transform into a door at this time (with an additional wood cost)
Maybe a technology or a card can allow that ? It will be necessary to indicate somewhere to the player the functioning of this particular system (in the description of the technology) and to avoid a too easy defense of trading posts at the beginning of the game (an age 4 technology ?)