They where ruthless conquerors and actually enjoyed warfare. The Mongols continued the brutal and ruthless conquest's, under Genghis son, and eventually under the rule of Genghis" grandson Khubilai Khan. .
The empire reached its greatest territorial extent with Khubilai's final defeat of the Sung dynasty of China, in 1279; however, his campaigns against Japan, Myanmar, Vietnam, and Indonesia failed. His role as the overlord of the Mongol empire was questionable, except in Mongolia and China. He recruited men of all nations for his civil service, but only Mongols were permitted to hold the highest government posts. He promoted economic prosperity by rebuilding the Grand Canal, repairing public granaries, and extending highways. Kublai encouraged foreign commerce, and his magnificent capital at Cambuluc was visited by several Europeans, most notably Marco Polo. .
While leaving on the steppes the nomadic Mongol population would migrate with the different seasons. They would "spend their winters in the steppes and warm regions where there is good grazing and pasture for their beast. In summer they lived cool regions among mountains and valleys, where they find water and woodland as well as pasturage." In the summer months, while living in the mountains, they would steadily climb higher up the mountain to provide a continuous source of grazing for their animals. If they stayed in a single spot "there would not be grass enough for the multitude of their flocks." Another bonus of the mountains was that where no horseflies to annoy the animals, like you would find in the warmer regions. Since they where nomadic the Mongols where forced to adapt to a life of migration. .
They carried their homes and possessions with them as they traveled. Marco Polo writes, "They have circular houses made of wood and covered with felt." They carried these homes on wagons pulled by horses. They houses where specially designed using specially constructed rods and framework, which made the homes considerably lighter and therefore easier to be carried by their animals.