Nationalism contributed to the formation of new nations and a new political order in Europe in the late 19th century. Nationalist movements led to the unification of Italy and Germany, as well as the breakup of aging empires like Austria-Hungary and the Ottoman Empire. Otto von Bismarck helped unite Germany through Prussian military strength and diplomacy that provoked wars with Denmark, Austria, and France, culminating in the establishment of a German Empire in 1871.