The empire built by Genghis Khan is known as the Mongol Empire, which became the largest contiguous empire in history. Established in the early 13th century, Genghis Khan unified various Mongolian tribes and led a series of military campaigns across Asia and into Europe. The empire fostered trade, cultural exchange, and the spread of ideas through the Silk Road. Genghis Khan's innovative military strategies and administrative practices significantly influenced the territories he conquered, shaping the course of history in numerous regions.