AdvanceChanged this version
Trans-Sahara Trade
Our traders frequently bring back fascinating things from the courts of North Africa. Perhaps they could find and bring back yet more fascinating trinkets?
SonghaiCountrypotentialAdvance tree
The game files don’t say where this goes: it has no requires, so the game places it in the 
Absolutism tree itself.
Modifiers
Definitionin_game/common/advances/country_SON.txt:76
78icon = markets_for_salt