Notice the message log. Particularly the 5 & 9 AUG entries. Muenster had 4 provinces, I had claims on 3 (planning to make his developed capital an enclave to save for later), I chose the 20-development (highest cost % of my 3 claims) Friesland as my war goal. Troops start marching in. Before they're even locked, the NED owns it. My ally, as you can see.
A similar thing happened w/ the Gelre province. I was about 2 months away from diplo-vassalizing them, and they just 'joined the union' suddenly. I guess the Dutch are just not meant to be under the German flag.
That's fine I guess. Their A.I. is really good... and I've never had such a good friend, that I could call into 2 separate (major) offensive wars at the same time. And their (sizeable) army is always making the right moves -- very helpful. Really impressive A.I., actually. Downright heroic. Polar opposite of the English A.I., which might be the worst in the game. IRL, I would be happy to have them as a Protestant ally. But knowing what I know, I only ally them temporarily when I'm about to attack France... promise them some land just because I feel sorry for them (yes the French used to have more than you see there).
The war starts, the French fort in Somerset wasn't even garrisoned. No enemy troops in country. Took them about 10 months to even enter French territory (in England). They were in London, and ran their entire army away to... Ireland. "I just ask you to WALK into the south of your own country, and siege, you fool!"
For a while, I thought I was going to have to go over there and get it done, myself. Is this just a fluke occurrence? No, the English A.I. is so bad, I really think it's game-breaking. Not only for western Europe, but for the would-be, but not-gonna-happen world empire. The English A.I. is totally out to lunch, all the time. Brain-dead & spineless.
Anyway, nothing surprises me anymore.
I get all 3 tech'ed up at once... 4 days later: "Hey Byzantine refugees". I'm not kidding.
Years later, I get all 3 techs again... ~20 days later: "Oh hey, here's your Brandenburg flavor event. A scientist / astronomer, that makes tech cheaper! Enjoy!"
This game definitely brings the lulz.