8 August -
We get:
Independence
War Reparations for 10 years
We free their vassal Yaroslavl
I move our troops back home, and then I will cut our army maintenance and fort maintenance costs to help bring my spending back up.
We are now in the Polish-Lithuanian alliance and within their hegemony. This was a huge win for them, they basically wrested two vassals free of their rival, and within a year.