SupremacyKing2
Deity
I wonder if you can use a causic belli like reconquest war with no penalty for warmongering to to take back the city if not that would be kind of broken mechanic
Well, remember that if you lose a city to low loyalty, it does not immediately join another civ but becomes a free city first. So you can probably reconquer it with no warmongering penalty. If you wait for the free city to flip again to another civ, then yes, attacking it would mean declaring war on another civ which would cause a warmongering penalty and you would need a casus belli to reduce the penalty.