The Battle of Friedland (14 June 1807) was a major engagement of the Napoleonic Wars between the armies of the French Empire commanded by Napoleon I and the armies of the Russian Empire led by Count von Bennigsen. Napoleon and the French obtained a decisive victory that routed much of the Russian army, which retreated chaotically over the Alle River by the end of the fighting. The battlefield is located in modern-day Kaliningrad Oblast, near the town of Pravdinsk, Russia.

The engagement at Friedland was a strategic necessity after the Battle of Eylau earlier in 1807 had failed to yield a decisive verdict for either side. The battle began when Bennigsen noticed the seemingly isolated reserve corps of Marshal Lannes at the town of Friedland. Bennigsen, who planned only to secure his march northward to Wehlau and never intended to risk an engagement against Napoleon's numerically-superior forces, thought he had a good chance of destroying these isolated French units before Napoleon could save them, and ordered his entire army over the Alle River. Lannes skillfully held his ground against determined Russian attacks until Napoleon could bring additional forces onto the field. Bennigsen could have recalled the Russian forces, numbering about 50,00060,000 men on the opposite bank of the river, and retreated across the river before the arrival of Napoleon's entire army but, being in poor health, decided to stay at Friedland and took no measures to protect his exposed and exhausted army. By late afternoon, the French had amassed a force of 80,000 troops close to the battlefield. Relying on superior numbers and the vulnerability of the Russians with their backs to the river, Napoleon concluded that the moment had come and ordered a massive assault against the Russian left flank. The sustained French attack pushed back the Russian army and pressed them against the river behind. Unable to withstand the pressure, the Russians broke and started escaping across the Alle, where an unknown number of them died from drowning. The Russian army suffered horrific casualties at Friedlandlosing over 40% of its soldiers on the battlefield.Napoleon's overwhelming victory was enough to convince the Russian political establishment that peace was necessary. Friedland effectively ended the War of the Fourth Coalition, as Emperor Alexander I reluctantly entered peace negotiations with Napoleon. These discussions eventually culminated in the Treaties of Tilsit, by which Russia agreed to join the Continental System against Great Britain and by which Prussia lost almost half of its territories. The lands lost by Prussia were converted into the new Kingdom of Westphalia, which was governed by Napoleon's brother, Jrme. Tilsit also gave France control of the Ionian Islands, a vital and strategic entry point into the Mediterranean Sea. Some historians regard the political settlements at Tilsit as the height of Napoleon's empire because there was no longer any continental power challenging the French domination of Europe.

Napoleon Bonaparte (born Napoleone di Buonaparte; 15 August 1769 – 5 May 1821) was a French military and political leader who rose to prominence during the French Revolution and led several successful campaigns during the Revolutionary Wars. He was the de facto leader of the French Republic as First Consul from 1799 to 1804. As Napoleon I, he was Emperor of the French from 1804 until 1814 and again in 1815. Napoleon dominated European and global affairs for a decade while leading France against a series of coalitions in the Napoleonic Wars. He won most of these wars and battles, building a large empire that ruled over continental Europe before its collapse in 1815. He was one of the greatest military commanders in history, and his wars and campaigns are studied in military schools worldwide. Napoleon's political and cultural legacy has endured, and he has been one of the most celebrated and controversial leaders in world history.Napoleon was born on the island of Corsica not long after its annexation by the Kingdom of France. He supported the French Revolution in 1789 while serving in the French army, and tried to spread its ideals to his native Corsica. He rose rapidly in the Army after he saved the governing French Directory by firing on royalist insurgents. In 1796, he began a military campaign against the Austrians and their Italian allies, scoring decisive victories and becoming a national hero. Two years later, he led a military expedition to Egypt that served as a springboard to political power. He engineered a coup in November 1799 and became First Consul of the Republic. Differences with the British meant that the French faced the War of the Third Coalition by 1805. Napoleon shattered this coalition with victories in the Ulm Campaign, and at the Battle of Austerlitz, which led to the dissolving of the Holy Roman Empire. In 1806, the Fourth Coalition took up arms against him because Prussia became worried about growing French influence on the continent. Napoleon knocked out Prussia at the battles of Jena and Auerstedt, marched the Grande Armée into Eastern Europe, annihilating the Russians in June 1807 at Friedland, and forcing the defeated nations of the Fourth Coalition to accept the Treaties of Tilsit. Two years later, the Austrians challenged the French again during the War of the Fifth Coalition, but Napoleon solidified his grip over Europe after triumphing at the Battle of Wagram.

Hoping to extend the Continental System, his embargo against Britain, Napoleon invaded the Iberian Peninsula and declared his brother Joseph King of Spain in 1808. The Spanish and the Portuguese revolted in the Peninsular War, culminating in defeat for Napoleon's marshals. Napoleon launched an invasion of Russia in the summer of 1812. The resulting campaign witnessed the catastrophic retreat of Napoleon's Grande Armée. In 1813, Prussia and Austria joined Russian forces in a Sixth Coalition against France. A chaotic military campaign resulted in a large coalition army defeating Napoleon at the Battle of Leipzig in October 1813. The coalition invaded France and captured Paris, forcing Napoleon to abdicate in April 1814. He was exiled to the island of Elba, between Corsica and Italy. In France, the Bourbons were restored to power. However, Napoleon escaped Elba in February 1815 and took control of France. The Allies responded by forming a Seventh Coalition, which defeated Napoleon at the Battle of Waterloo in June 1815. The British exiled him to the remote island of Saint Helena in the Atlantic, where he died in 1821 at the age of 51. Napoleon had an extensive impact on the modern world, bringing liberal reforms to the many countries he conquered, especially the Low Countries, Switzerland, and parts of modern Italy and Germany. He implemented liberal policies in France and Western Europe.