Oof. Right. My historical brain was sapped by the various 1919 Peace Conference treaties. Which had a seriously amazing review session today. We were looking over the Treaty of St Germain, which is the one that was hurting Austria, and one of the items was "stripped of all German territories, but Anschluss prohibited."
Having no idea what Anschluss is, I asked my teacher, who calmly replied with "reuniting the German regions of Austria with Germany, making them one nation."
To which I just grinned.