The key outcome of the Congress of Vienna in 1815 was the redrawing of Europe's political map following the Napoleonic Wars, aiming to restore balance and stability to the continent. Led by major powers like Austria, Britain, Prussia, and Russia, the Congress sought to contain French expansion and prevent future conflicts through diplomatic means. New territorial boundaries were established, and the principle of legitimacy upheld existing monarchies. The Congress also introduced the idea of collective security, which influenced European politics for decades, ultimately contributing to a relatively stable continental order until the outbreak of World War I in 1914.