The Cold War dominated European geo-politics from 1947 to 1989. Unification into a European Union moved forward after 1950, with some setbacks. Today, most countries west of Russia belong to the NATO military alliance, along with the United States and Canada.
The period known as classical antiquity began with the emergence of the city-states of Ancient Greece. After ultimately checking the Persian advance in Europe through the Greco-Persian Wars in the 5th century BC, Greek influence reached its zenith under the expansive empire of Alexander the Great, spreading throughout Asia, Africa, and other parts of Europe. The Roman Empire came to dominate the entire Mediterranean basin. By 300 AD the Roman Empire was divided into the Western and Eastern empires. During the 4th and 5th centuries, the Germanic peoples of Northern Europe grew in strength, and repeated attacks led to the Fall of the Western Roman Empire. AD 476 traditionally marks the end of the classical period and the start of the Middle Ages.
In Western Europe, Germanic peoples became more powerful in the remnants of the former Western Roman Empire and established kingdoms and empires of their own. Of all of the Germanic peoples, the Franks would rise to a position of hegemony over Western Europe, the Frankish Empire reaching its peak under Charlemagne around 800. This empire was later divided into several parts; West Francia would evolve into the Kingdom of France, while East Francia would evolve into the Holy Roman Empire, a precursor to modern Germany and Italy. The British Isles were the site of several large-scale migrations.
The Viking Age, a period of migrations of Scandinavian peoples, occurred from the late 8th century to the middle 11th century. The Normans, a Viking people who settled in Northern France, had a significant impact on many parts of Europe, from the Norman conquest of England to Southern Italy and Sicily. The Rus' people founded Kievan Rus', which evolved into Russia. After 1000 the Crusades were a series of religiously motivated military expeditions originally intended to bring the Levant back under Christian rule. The Crusaders opened trade routes which enabled the merchant republics of Genoa and Venice to become major economic powers. The Reconquista, a related movement, worked to reconquer Iberia for Christendom.
Eastern Europe in the High Middle Ages was dominated by the rise and fall of the Mongol Empire. Led by Genghis Khan, the Mongols were a group of steppe nomads who established a decentralized empire which, at its height, extended from China in the east to the Black and Baltic Seas in Europe. As Mongol power waned towards the Late Middle Ages, the Grand Duchy of Moscow rose to become the strongest of the numerous Russian principalities and republics and would grow into the Tsardom of Russia in 1547. The Late Middle Ages represented a period of upheaval in Europe. The epidemic known as the Black Death and an associated famine caused demographic catastrophe in Europe as the population plummeted. Dynastic struggles and wars of conquest kept many of the states of Europe at war for much of the period. In Scandinavia, the Kalmar Union dominated the political landscape, while England fought with Scotland in the Wars of Scottish Independence and with France in the Hundred Years' War. In Central Europe, the Polish–Lithuanian Commonwealth became a large territorial empire, while the Holy Roman Empire, which was an elective monarchy, came to be dominated for centuries by the House of Habsburg. Russia continued to expand southward and eastward into former Mongol lands. In the Balkans, the Ottoman Empire overran Byzantine lands, culminating in the Fall of Constantinople in 1453, which historians mark as the end of the Middle Ages.
Beginning in the 14th century in Florence and later spreading through Europe, a Renaissance of knowledge challenged traditional doctrines in science and theology. The rediscovery of classical Greek and Roman knowledge had an enormous liberating effect on intellectuals. Simultaneously, the Protestant Reformation under German Martin Luther questioned Papal authority. Henry VIII seized control of the English Church and its lands. The European religious wars between German and Spanish rulers. The Reconquista ended Muslim rule in Iberia. By the 1490s a series of oceanic explorations marked the Age of Discovery, establishing direct links with Africa, the Americas, and Asia. Religious wars continued to be fought in Europe, until the 1648 Peace of Westphalia. The Spanish crown maintained its hegemony in Europe and was the leading power on the continent until the signing of the Treaty of the Pyrenees, which ended a conflict between Spain and France that had begun during the Thirty Years' War. An unprecedented series of major wars and political revolutions took place around Europe and the world in the period between 1610 and 1700.