The Mongol invasion refers to a series of military campaigns led by the Mongol Empire in the 13th century. Under the leadership of Genghis Khan, the Mongols expanded their territory by conquering vast regions across Asia and Europe. Their highly mobile cavalry and innovative tactics allowed them to defeat larger armies and capture key cities. The invasions resulted in significant cultural and political changes in the affected regions. The Mongols established control over areas such as China, Persia, and parts of Eastern Europe, creating one of the largest empires in history. Despite their reputation for brutality, the Mongols also facilitated trade and communication across their empire.