Unification of Germany (1866-1871):

In 1848, middle-class Germans tried to unite the different regions of the German confederation into a nation state under an elected parliament.
In Prussia, nation building acts were repressed by the combined forces of the monarchy and the military and were supported by the landowners (Junkers).
Prussia took over the leadership of the movement for national unification.
Otto Von Bismark, chief minister of Prussia, was the architect of the leading role of Prussia in the process of nation-building.
Prussia emerged victorious after fighting three wars over seven years against the combined forces of Austria, Denmark and France and the process of unification of Germany was completed
18th January 1871: The new German empire headed by the German Emperor Kaiser William I was declared in the Hall of Mirrors in the Palace of Versailles.
The unification of Germany established Prussian dominance in Europe.
The New German Empire focused on modernizing the currency, banking, legal and judicial systems.

Refer google