The document summarizes the Mongol Empire from 1200-1300 CE. It describes how the Mongols, originally nomadic tribes from Central Asia, created the largest land-based empire in history under the leadership of Genghis Khan. By Khan's death in the 1220s, Mongol armies had conquered territory across Eurasia from Central Asia to Eastern Europe. Though the Mongols were initially seen as destroyers, their empire also led to a period of stability, increased trade along the Silk Road, and the spread of innovations between East and West. The Mongols' vast conquests connected much of the known world but also caused immense destruction and death, and may have spread pandemics like the Black Plague.