AdvanceChanged this version
Pan-Celticism
Our vision of a united Celtic world is more than an ideal - it is a rallying call to all who share our heritage. Together, we forge bonds that reach beyond borders, making our identity as enduring as the hills and seas we call home.
CelticaFormable CountrypotentialAdvance tree
The game files don’t say where this goes: it has no requires, so the game places it in the 
Revolutions tree itself.
Modifiers
Definitionin_game/common/advances/culture_irish.txt:241
244icon = cultural_ties