The unification of Germany, politically and administratively, in a nation-state, was held officially on January 18, 1871. The princes of the German states gathered to proclaim Wilhelm of Prussia as Emperor Wilhelm of the German Empire after the French defeat in the Franco-Prussian War. Informally, the transition from fact that most populations of German speakers for a federated organization of states took place earlier, through formal and informal alliances between noble - and also irregularly due to the difficulties raised by the interests of aristocratic groups, since the dissolution of the Holy Roman Empire in 1806, and the subsequent rise of nationalism throughout the period of the Napoleonic Wars. Germany is the last major country in Europe to be unified into a nation-state.
The Holy Roman Empire of the German Nation, which had added more than 500 independent states, was dissolved when Emperor Francis IV abdicated in 1806. Despite the legal, administrative and associated with the end of Empire political break, people of German-speaking areas of the former Empire shared a linguistic, cultural and legal tradition common, enhanced by their shared experience in the French Revolutionary Wars. Separate each state had its own ruling class and its feudal associations, local traditions and laws. However, were the representatives of the largest states, Prussia and Austria, which had more power and ultimately decide almost everything. There was also a conflict of interests between Austria and Prussia. While Austria was opposed to unification, Prussia was favorable because it intended to increase its power over the German territory and expand industrial development.
The model of diplomatic spheres, resulting influence of the Congress of Vienna in 1814-15 after the Napoleonic Wars, sanctioned Austrian rule in Central Europe. However, negotiators in Vienna did not take into account the growing strength of Prussia among the German states, and thus have failed to envision that Prussia would do against Austria to achieve leadership among the German states.
To complete the goal of unifying all Germanic states, Prussia needed to win the southern states. However, the emperor of France, Napoleon III, opposed the idea and declared war on Prussia in 1870. With an army of Prussian and other German states military, Prussia commanded the invasion and conquest of France. William I was proclaimed Emperor of Germany in 1871, thus completing the unification of Germany. The main consequences of German unification of Germany were military, and economic development; growing geopolitical power of Germany in Europe, Germany Entry in dispute over territory in the neo-colonization of Africa and Asia and the formation of the Triple Alliance in 1882 process, political- block military consists of Austria, Italy and Germany.