Among the conflicts that convulsed Europe during the nineteenth century, none was more startling and consequential than the Franco-Prussian War of 1870–1871. Deliberately engineered by Prussian chancellor Otto von Bismarck, the war succeeded in shattering French supremacy, deposing Napoleon III, and uniting a new German Empire. But it also produced brutal military innovations and a precarious new imbalance of power that together set the stage for the devastating world wars of the next century.