History › Age of revolutions › Rise of nationalism and the revolutions of 1848
Unification of Germany
proclaimed January 18, 1871, after wars of 1864–1871· Event· Europe
Well documentedSolid records, physical evidence or scientific consensus.
Prussia, steered by Otto von Bismarck, united most German states into one empire in 1871 after three short wars.
See it on the History map →What happened
In 1815 Germany was a loose confederation of 39 states. Prussia's chief minister, Otto von Bismarck, said great questions are decided by 'iron and blood', not speeches. He fought Denmark (1864), Austria (1866) and France (1870–71). Each quick victory pulled more states into Prussia's orbit and kept Austria out. On January 18, 1871, King Wilhelm I was proclaimed German Emperor in the Hall of Mirrors at Versailles, outside besieged Paris. France lost Alsace-Lorraine.
Why it matters
A new industrial and military giant sat in the middle of Europe, upsetting the balance of power. French anger over Alsace-Lorraine fed the rivalries that led to World War I.
How we know
Bismarck's speeches and memoirs, diplomatic archives, the Ems Dispatch he edited to provoke France, and Anton von Werner's painting of the 1871 proclamation.
Still debated
Historians debate how much Bismarck planned unification step by step versus improvising, and how much the earlier customs union (Zollverein, 1834) had already tied Germany together.
Connections (3)
▸Napoleon Bonaparte redrew Germany, setting the stage for Unification of GermanyMostly agreed
The connection
Napoleon forced the end of the centuries-old Holy Roman Empire in 1806 and merged roughly 300 German territories into a few dozen larger states. His occupation also stirred German national feeling against French rule. After his fall, the 1815 Congress of Vienna kept a simpler map of 39 states, most of which Prussia later united.
When and how
German lands, 1803–1815: the 1803 reorganization, the Confederation of the Rhine (1806), Prussia's defeat at Jena (1806) and the 'Wars of Liberation' (1813–14).
How sure are we?
Treaties and maps of the period show the consolidation clearly; Johann Gottlieb Fichte's Addresses to the German Nation (1808) shows rising nationalism.
Debates and open questions
How widely ordinary Germans felt national loyalty in 1813, rather than local or dynastic loyalty, is debated; later nationalist historians may have exaggerated it.
▸Rise of nationalism and the revolutions of 1848 drove the Unification of GermanyWell documented
The connection
Nationalism held that a people sharing a language and culture should have its own state. German liberals tried to unite Germany through an elected parliament at Frankfurt in 1848, but failed when Prussia's king refused their crown. Bismarck then harnessed national feeling for Prussia's ends, achieving unity through war rather than votes.
When and how
The Frankfurt Parliament of 1848–49, then Bismarck's wars of 1864–71; the customs union (Zollverein), nationalist clubs, songs and newspapers spread the idea.
How we know
Frankfurt Parliament records, Bismarck's speeches and letters, and the public enthusiasm recorded during the 1870 war against France.
Debates and open questions
Historians debate whether nationalism drove Bismarck, or whether he, a conservative Prussian, simply used it as a tool to expand Prussian power.
▸Unification of Germany was proclaimed where Germany later signed the Treaty of VersaillesWell documented
The connection
Germany's empire was proclaimed in the Hall of Mirrors at Versailles in 1871, after France's defeat, and France lost Alsace-Lorraine. In 1919 the French deliberately had Germany sign the peace treaty in that same hall. The treaty returned Alsace-Lorraine to France, a symbolic reversal of 1871 that Germans resented in turn.
When and how
Hall of Mirrors, Palace of Versailles, near Paris: January 18, 1871, and June 28, 1919; French Premier Georges Clemenceau had voted against the 1871 peace as a young deputy.
How we know
Paintings, photographs and official records of both ceremonies, and French leaders' own statements that the venue was chosen as redress for 1871.
Debates and open questions
How much this symbolism shaped the treaty's harsh terms, as opposed to French security fears and war costs, is a matter of interpretation.