The 2 1916 battles would be The Battle of Marne and The Battle of Verdun
No it's either you Christian or Catholic you can't be both at the same time unless you wanna change religions.
Otto Von Bismarck was able to unite the northern German confederation with the south by going to war with France. The smaller German nations who would’ve lost against France flocked to join the North, and when the Germans won the war, they declared the creation of the German empire at the palace of Versailles. (Franco-Prussian war, 1870-1871)