How to make a vassal

[Alex The Great]

Well in a campaign with spain i wasnt so lucky. Im using lightmod and 1.1 and well i was kicking the frecnh asses im not insulting no1 so then they got 3 more provinces then i offered vassalage for 450000 and they accepeted they gave me 70k of tributes per turn but it was not cheap i didnt cheat

[Omisan]

I think I'll just go back to medium campaign difficulty for my next game. It's the only way to get reasonable diplomacy.