Destruction under the Mongol Empire

The Mongol conquests of the 13th century resulted in widespread and well-documented destruction. The Mongol army conquered hundreds of cities and villages and killed millions of people. One estimate is that about 10 percent of the world's population was killed either during or immediately after the Mongol invasions, around 37.75–60 million people in Eurasia. These events are regarded as some of the deadliest acts of mass killing in human history.

Mongol conquests were described as genocidal. British historian John Joseph Saunders described the army of the Mongol Empire as "the most notorious practitioners of genocide".