A few turns ago, France declared war on Quebec. Almost immediately, CS got the quest 'defend the city from the barbarians' (they don't respect Napoleon at all).
It seems to me that such a quest should not appear if CS is already at war on its own with the AI or another city-state. If at war as someone's ally, then I see no reason to ban the quest.
These barbarians bring confusion to the clash of the warring parties and actually provide CS with additional protection by diverting AI attacks. Or they can make the 'war between two CS' quest easier and give advantage to one of the CS, which once happened in an earlier version.
It seems to me that such a quest should not appear if CS is already at war on its own with the AI or another city-state. If at war as someone's ally, then I see no reason to ban the quest.
These barbarians bring confusion to the clash of the warring parties and actually provide CS with additional protection by diverting AI attacks. Or they can make the 'war between two CS' quest easier and give advantage to one of the CS, which once happened in an earlier version.
Spoiler :