Advance
Formalized Officer Corps
Traditionally, our military officers come from the nobility, but we do not have enough people in that estate to fill the necessary roles. However, there are many skilled members of the lower classes in our armies who would do nicely — we should consider promoting some of them as professional officers.
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
Army Initiative+25%