Advance
Private to Marshal
Every private has a marshal's baton in his back. Well, perhaps not exactly, but for those who distinguish themselves in battle, promotion and rewards will follow. The troops know this and are inspired by it.
Advance 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/4_choices_mil.txt:341
343icon = military_revolution_advance
344for = mil