The military of the Yuan dynasty (1271–1368) were the armed forces of the Yuan dynasty, a fragment of the Mongol Empire created by Kublai Khan in China. The forces of the Yuan were based on the troops that were loyal to Kublai after the Division of the Mongol Empire in 1260. At first this Tamma, a frontier army drawn from all Mongol tribes for conquest of China, had no central organisation but was rather a loose collection of local warlords and Mongol princely armies. However the army was gradually reformed by Kublai Khan into a more systematic force.