Answer:
Disease and weather
Explanation:
The two factors that forced the Mongols to withdraw from Southeast Asia were disease and weather. The Mongols had conquered enourmous expanses of land in a great variety of territories. However, Southeast Asia proved very challenging because of its weather. The Mongols were not used to fighting in such wet and hot weather. Moreover, tropical diseases were abundant, and this proved to be very challenging for the Mongol army.
