The document summarizes the rise of nationalism and unification movements in Italy, Germany, and the Balkans in the 19th century. It describes how Italian nationalists like Mazzini, Cavour, and Garibaldi united the Italian states, and how Otto von Bismarck used military force and war to unify the German states under Prussian leadership. The document also discusses how ethnic and religious tensions in the Balkans and Ottoman Empire led to nationalist conflicts that contributed to the outbreak of World War I.