stylistic:style_transfer, quality:corruption, quality:correction, structural:scholar_edition
Unification of Germany

Bismarck acted immediately to secure the unification of Germany. He negotiated with representatives of the southern German states, offering special concessions if they agreed to unification. The negotiations succeeded; patriotic sentiment overwhelmed what opposition remained. While the war was in its final phase, Wilhelm I of Prussia was proclaimed German Emperor on 18 January 1871 in the Hall of Mirrors in the Château de Versailles. The new German Empire was a federation: each of its 25 constituent states (kingdoms, grand duchies, duchies, principalities, and free cities) retained some autonomy. The King of Prussia, as German Emperor, was not sovereign over the entirety of Germany; he was only primus inter pares, or first among equals. However, he held the presidency of the Bundesrat, which met to discuss policy presented by the Chancellor, whom the emperor appointed.

In the end, France had to cede Alsace and part of Lorraine, as Moltke and his generals wanted it as a buffer. Historians debate whether Bismarck wanted this annexation or was forced into it by a wave of German public and elite opinion. France was also required to pay an indemnity; the indemnity figure was calculated on the basis of population, as the precise equivalent of the indemnity that Napoleon I had imposed on Prussia in 1807.

Historians debate whether Bismarck had a master plan to expand the North German Confederation of 1866 to include the remaining independent German states into a single entity or simply to expand the power of the Kingdom of Prussia. They conclude that factors in addition to the strength of Bismarck's Realpolitik led a collection of early modern polities to reorganize political, economic, military, and diplomatic relationships in the 19th century. Reaction to Danish and French nationalism provided foci for expressions of German unity. Military successes—especially those of Prussia—in three regional wars generated enthusiasm and pride that politicians could harness to promote unification. This experience echoed the memory of mutual accomplishment in the Napoleonic Wars, particularly in the War of Liberation of 1813–14. By establishing a Germany without Austria, the political and administrative unification in 1871 at least temporarily solved the problem of dualism. Historian Robert K. Massie has noted Bismarck's popular image was as "gruff" and "militaristic", while in reality "Bismarck's tool was aggressive, ruthless diplomacy."

Jonathan Steinberg said of Bismarck's creation of the German Empire that:

the first phase of great career had been concluded. The genius-statesmen had transformed European politics and had unified Germany in eight and a half years. And he had done so by sheer force of personality, by his brilliance, ruthlessness, and flexibility of principle.... marked the high point of career. He had achieved the impossible, and his genius and the cult of genius had no limits.... When he returned to Berlin in March 1871, he had become immortal...