I think i've finally put my finger on why so many people keep writing Gdansk when they mean Danzig. It's because Danzig is a german term, given by the ethnically german settlers to the place, and made official by the napoleonic Free state of Danzig. It was later scooped up by Prussia and joined it when all the german princes united and called themselves the enpire of germany, and stayed with germany until the treaty of Versalles, where under article 100 it was refounded under the Leauge of Nations control, to keep it away from the new and untrusted Weimar republic. During world war two it was reconquered like all of poland was at the time, and quietly became a polish state under the potsdam agreement, when all of europe was carved up and quietly became irrelevant in world affairs since there was a big cold war going on.

I'm saying all this because, like Cleo's already said, we're not in the modern day like we know it today. At some point, history has diverged due to the presence of magical girls and hasn't been quite the same since, because some events have been noticed in character and some haven't. 

The thing is that it's really hard to tell what changed. There's a Japan, so it obviously wasn't nuked to death by the Americans. There's a France, an England and a Switzerland and a Poland, so most of europe's history went the way it did. But we're calling a polish state by it's german name, so the Potsdam agreement didn't make such a thing unthinkable. Germany has a lot more power and a lot more cultural influence if they're telling people what polish towns are called, so they're not seen so much as the standard bad guys we think them as today.

So, we're living in an alternate history where, due to whatever happened, there either wasn't a global second world war or there was one that the nazis won.

Or i'm overthinking it.