Advance
Élan!
Cultivating the doctrine of attack is the hallmark of our army. Our men must fight with élan — spirit and vigor — giving us a clear edge on the battlefield.
FranceCountrypotentialAdvance tree
The game files don’t say where this goes: it has no requires, so the game places it in the 
Renaissance tree itself.
Modifiers
Army Morale+20%
Definitionin_game/common/advances/country_FRA.txt:27
29content_priority = 1100
35ai_weight = {
35add = 20
}