AdvanceChanged this version
Bonded by Loyalty
Our valiant armies never waver! They demonstrate exceptional morale and loyalty, standing firm whether defending our realm or supporting allies. With indomitable spirits, they will press forward even in desperate circumstances, refusing defeat until physically unable to continue.
MeissenCountrypotential
SaxonyFormable CountrypotentialAdvance tree
The game files don’t say where this goes: it has no requires, so the game places it in the 
Reformation tree itself.
Modifiers
Army Morale+10%
Definitionin_game/common/advances/country_mei.txt:79
88ai_weight = {
88add = 10
}