Explanation

The Mongol conquest of Khwarezmia or the Mongol invasion of Iran from 1219 to 1221 marked the beginning of the Mongol conquest of the Islamic states. The Mongol expansion would ultimately culminate in the conquest of virtually all of Asia (as well as parts of Eastern Europe) with the exception of Japan, the Mamluk Sultanate of Egypt, Siberia, and most of the Indian subcontinent and Southeast Asia.