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Ogedei Khan (aka Ogodei) ruled the Mongol Empire from 1229 to 1241. He was the third son of Genghis Khan (r. 1206-1227), the empire's founder. Ogedei's accomplishments included creating a new capital at Karakorum, establishing a system of...

The Bohemian Reformation (c. 1380 to c. 1436) was the first concerted effort by Catholic clergy to reform the abuses and corruption of the medieval Church. Bohemian clerics and theologians called for reform and, like later advocates, initially...

The German-Soviet War, known in the USSR and today's Russia as the Great Patriotic War or, in Western Europe, as the Eastern Front of the Second World War (1939-45), began in June 1941 with Operation Barbarossa and ended in Germany's total...

The Battle of Austerlitz (2 December 1805), or the Battle of the Three Emperors, was one of the most significant battles of the Napoleonic Wars (1803-1815). It saw French Emperor Napoleon I (r. 1804-1814; 1815) and his Grande Armée decisively...

The Battle of the Catalaunian Fields (also known as The Battle of Chalons, The Battle of Maurica) was one of the most decisive military engagements in history between the forces of the Roman Empire under Flavius Aetius (391-454 CE) and those...

Located west of the Danube, Pannonia was essential for the protection of the Roman Empire's eastern frontier. It had been occupied since 9 BCE but did not willingly accept Roman authority. Pannonia and Dalmatia revolted in 6 CE, and it would...

"This map shows the main routes taken by those who joined the First Crusade. The appeal was made by Pope Urban II in November 1095 CE but crusaders did not set out until the following summer. One route went through Hungary crossing the Byzantine...

A map illustrating the military campaigns and the expansion of Mongol territory under the leadership of Genghis Khan after the founding of the Mongol Empire in 1206 until his death in 1227. Genghis Khan (1162-1227) rose from relative obscurity...

This map illustrates the geopolitical situation in Europe in the lead-up to the Second World War (1939-45) as authoritarianism and totalitarianism were on the rise across the continent, fueled by political instability, economic crises, and...

Suleiman the Magnificent (also known as Süleyman, Suleyman I, or Suleiman the Lawgiver) was the tenth and longest-reigning sultan of the Ottoman Empire, ruling from 1520 to 1566. Over his 45-year reign, he governed a vast, diverse empire...