Mongol invasions of India invasions might give a better indication of the numbers involved, as these commanders probably led tumens, units nominally of 10,000 men. These invasions were led by either various descendants of Genghis Khan or by Mongol divisional commanders; the size of such armies was always between 10,000-30,000 cavalry although the chroniclers of Delhi exaggerated the number to 100,000-200,000 cavalry. After civil war broke out in the Mongol Empire in the 1260s, the Chagatai Khanate controlled Central Asia and its leader since the 1280s was Duwa Khan who was second in command of Kaidu Khan. Duwa was active in Afghanistan, and attempted
Kublai Khan Kublai's son, who was born in 1243, Zhenjin (Chinese: "True Gold"). Haiyun also introduced Kublai to the formerly Daoist and now Buddhist monk, Liu Bingzhong. Liu was a painter, calligrapher, poet, and mathematician, and he became Kublai's advisor when Haiyun returned to his temple in modern Beijing. Kublai soon added the Shanxi scholar Zhao Bi to his entourage. Kublai employed people of other nationalities as well, for he was keen to balance local and imperial interests, Mongol and Turk. In 1251, Kublai's eldest brother Möngke became Khan of the Mongol Empire, and Khwarizmian Mahmud Yalavach and Kublai were sent to