Part 1: [link]
Panel one: The people in Vienna were in fact incredibly grateful and relieved. I just think Austria gets extremely cranky when people deny him his daily coffee and cake (technically he didn't have coffee back then but anyway).
Of course not all Austrians wore that pink uniform, it was a regional thing. The gorgeous boots were very popular back then, though
There are probably countless OCs for Brazil so I'm sure my version here must look like a character that already exists. I simply wanted him to be a tanned guy with tousled black hair but if someone feels that I've stolen his design: it didn't happen on purpose.
Panel 11: Damn you Goethe for writing that awful book. It was the Twilight of the eighteenth century in my opinion. [link]
I'm sure Ludwig pretends to like it because Goethe was German but secretly he craves Kant, Nietzsche, Schiller, Hegel and even Marx.
My headcanon says Turkey stopped hiding his face when Atatürk came along. That's why he isn't wearing his usual mask in panel 3,4 and 5.