@Rohen Uhm, you are partially right, but Austria-Hungary was NEVER part of Germany. In fact we had no relationship with the vast majority of German territories with the exception of Bavaria (southern Germany). It wasn't until the Weimar Republic that relations with "Germany" improved and there was loose talk of a Greater Germanic Country, but that was more of a philosophical thought that noone really took that seriously as we had much stronger relations with the slavic former empiral states (e.g. Slovenia, Slovakia, Czechia, Croatia, etc. and most importantly of course Hungary, which is not a slavic country) around us. Therefore, the idea was pretty much abandoned entirely until after WWI and the fall of the Austro-Hungarian Empire. We joined the fight against Prussia, but to say we at any point were or intended to be part of Germany (with the exception of the Second World War) is just not correct ^^
Greetings from Austria