I'm apparently on the receiving end of a completely uncalled for war!
I suppose that is technically true. You never called for war with Osoerde explicitly. To us, at least.
I mean, you did cut Osoerde off from a vassal. And there were multiple seasons of failed diplomacy. And you declared an Osoerdean vassal anathema. And insulted others. And rejected the possibility of further Diplomacy to resolve the situation. And conspired against a vassal state. And so on.
But, hey, you never actually
said "Let's have a war!" That's Osoerde's job, what with us being such imperialistic bastards and all. Good point!