The Franco-Prussian War or Franco-German War, often referred to in France as the War of 1870, was a conflict between the Second French Empire and the North German Confederation led by the Kingdom of Prussia. Lasting from 19 July 1870 to 28 January 1871, the conflict was caused primarily by France's determination to reassert its dominant position in continental Europe, which appeared in question following the decisive Prussian victory over Austria in 1866. According to some historians, Prussian chancellor Otto von Bismarck deliberately provoked the French into declaring war on Prussia in order to induce four independent southern German states—Baden, Württemberg, Bavaria and Hesse-Darmstadt—to join the North German Confederation; other historians contend that Bismarck exploited the circumstances as they unfolded. All agree that Bismarck recognized the potential for new German alliances, given the situation as a whole.
(clockwise from top right) Battle of Mars-la-Tour, 16 August 1870 The Lauenburg 9th Jäger Battalion at Gravelotte The Last Cartridges The Defense of Champigny The Siege of Paris in 1870 The Proclamation of the German Empire
French soldiers drill at IIe Chambrière camp near Metz, 1870
Prussian field artillery column at Torcy in September 1870
Bavarian infantry at the Battle of Wissembourg, 1870
The German Empire, also referred to as Imperial Germany, the Second Reich or simply Germany, was the period of the German Reich from the unification of Germany in 1871 until the November Revolution in 1918, when the German Reich changed its form of government from a monarchy to a republic.
The German colonial empire in 1914
Chancellor Bismarck
Wilhelm I in 1884
Die Proklamation des Deutschen Kaiserreiches by Anton von Werner (1877), depicting the proclamation of Emperor William I (18 January 1871, Palace of Versailles). From left, on the podium (in black): Crown Prince Frederick (later Frederick III), his father the emperor, and Frederick I of Baden, proposing a toast to the new emperor. At centre (in white): Otto von Bismarck, first Chancellor of Germany, Helmuth von Moltke the Elder, Prussian Chief of Staff.