I'm playing a solo game where I allied Frederick Barbarossa, who doesn't like Suzerains. I control one city-state, but so far his diplomacy penalty on me for that reason is -7 and I've been able to work around that and maintain the alliance.
Unfortunately, several other NPCs and their child city-state allies declared war on me. One of the city-states was nearby so I counter-attacked and defeated that city-state.
So far, so good. But Frederick assigned me a warmongering penalty of -47 and is now in danger of breaking our alliance. Does Frederick reasonably expect me to simply kill all that city-state's military and leave that city-state alone? That would leave an enemy city-state right next to me who can generate more units and attack.
I went back to the auto-save file and tried razing the city instead of keeping it but that just raised the warmongering penalty to -82.
1) How do I neutralize that city-state while keeping Frederick as an ally?
2) Is there any way to unsuzerain yourself so that you voluntarily release control of a city-state?
I'm playing this game at the King level and am trying to work my way up to Emperor so anything you-all can say is helpful. Thanks!
PS. The warmongering penalty strikes me as a very strange, unhelpful, and unrealistic idea, but that's another thread.