Just a note to all. Many of you know this, I did not and several fellow players did not, if you are playing as Prussia, Sardinia/Piedmont, the Ottoman, France and even Russia - Austria is a beast. Do not make an alliance with her. She is so strong in the opening all other nations need to keep her controlled and limit her conquests.
Do not think of Austria in 1914, Austria 1850 is a potential terror of the world.
Later, post 1860, you can make alliances.