I see, they only declared war on one of my lands but the game ended, could that be a bug?
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It could be. But I would need more info on your circumstances in order to recreate it. There was a bug with that in version 1.0 but it has since been fixed and I haven’t been able to recreate it anymore. You could also be the subject of 2 wars in one season and just didn’t notice the additional message was about your lands.