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The Franco-Prussian War, also known as the Franco-German War, was a conflict between France and Prussia from 1870 to 1871. The Prussian army, led by Helmuth von Moltke, achieved decisive victories at Sedan and Metz, leading to the capture of Emperor Napoleon III and the collapse of the Second French Empire. The war resulted in the unification of Germany under Prussian leadership and the establishment of the German Empire.