I have noticed that when i have an average army, the AI just attack from all sides, but i jus played as poland and i didnt build hardly anything at the beginning and only units. After attacking HRE and taking 2 of their towns, they asked for ceasefire and i countered with asking for 2 towns and they accepted.
I also got york off england, a town off france, two more of HRE and 20,000 florin from denmark (2 ceasefires for 10,000 a time).
Is the AI made so it will give big gifts to people stronger than them?