Advance
Postal Service
With communications being what they are, it is difficult to ensure that our diplomatic dispatches arrive in a timely fashion. Creating a network of post offices and courier rest stops will make it easier for our voice to be heard in distant lands.
Advance tree
It has no requires, so the game files don’t say where this goes. When the game builds the 
Revolutions tree, it adds this at the end of a branch with room for it, in the same spot in every campaign.
Belongs to 1
- RevolutionsAge
icon = road_building
for = dip