Brunswick maifesto
Austria
Austria-Hungary
No, she was born Austrian. Her mother, the empress of Austria, had a rivalry with Fredrich of Prussia.
King Frederick the Great
Prussia's main rival for leadership of the German people, according to Bismarck, was Austria. This rivalry culminated in the Austro-Prussian War of 1866. Bismarck sought to weaken and marginalize Austria's influence over the German states to establish Prussian dominance in a unified Germany.
Austria's modern origins begin in 1871, when Germany unified under the Prussian flag and Austria was denied entry into the Empire. After WW2, Austria became a Nation-State, with it's own nationality. Before WW2, Austria was a state but the people were Germans.
Austria-Hungary and Germany
Otto von Bismarck
It has been called the "Seven Weeks War" or the "Austro-Prussian War".
The Austro-Prussian War (against Austria)and The two Schleswig Wars (against Denmark)
The Anschluss, also known as the Anschluss Österreichs, was the annexation of Austria into Nazi Germany on 12 March 1938. The idea of an Anschluss (a united Austria and Germany that would form a "Greater Germany") began after the unification of Germany excluded Austria and the German Austrians from the Prussian-dominated German Empire in 1871.
They had a strong alliance with Germany, the allies strike against Austria was too devastating so it had to leave the alliance and surrender to avoid its own defeat. (This goes for both WW1 and WW2