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
Division of the Mongol Empire The transition of the capital of the Mongol Empire to Khanbaliq (Dadu, modern-day Beijing) by Kublai Khan in 1264 was opposed by many Mongols. Thus, Ariq Böke's struggle was for keeping the center of the Empire in Mongolia homeland. After Ariq Böke's death, the struggle was continued by Kaidu, a grandson of Ogedei Khan and lord Nayan. By eliminating the Song dynasty, Kublai Khan completed the conquest of China. The fleets of the Yuan dynasty attempted to invade Japan in 1274 and 1281, but both invasion failed, and a large number of their ships were destroyed in sea storms named