Nations emerged in the 19th century via nationalist ideologies, political movements, and military consolidation, transforming Europe's map from empires to unified states. Germany: Otto von Bismarck, Prussia's Chief Minister, spearheaded unification. His 'blood and iron' policy involved three wars (against Denmark, Austria, France). These victories, harnessing shared German culture, brought states under Prussian leadership, leading to the 1871 German Empire proclamation. Italy: Italian nation-building combined popular and state-led efforts. Mazzini's 'Young Italy' sought a republic. Count Cavour of Piedmont-Sardinia used diplomacy and war to defeat Austria. Garibaldi's 'Red Shirts' liberated southern territories. These efforts formed the Kingdom of Italy by 1870 under the House of Savoy.