Advance
Pomestnoe Voisko
By redistributing plots of confiscated lands to noble cavalrymen, we can build a new class of soldiers to defend our principality.
Potential
Is or was 
Muscovy
MuscovyExact conditions
Advance tree
It has no requires, so the game files don’t say where this goes. When the game builds the 
Discovery tree, it adds this at the end of a branch with room for it, in the same spot in every campaign.
Army Morale+10%
content_priority = 900
icon = pomestnoe_voisko
ai_weight = {
add = 10
}