After the fall of the Yuan dynasty in 1368, the Ming dynasty rebuilt the Great Wall, which had been begun many hundreds of years earlier to keep the northern nomads out of the Central Plain. During the subsequent centuries, the Northern Yuan dynasty tended to continue their nomadic way of life.
The Ming dynasty reestablished the Great Wall after the Yuan dynasty's downfall in 1368, a structure that had begun long ago to protect the Central Plain from northern tribes. In the subsequent ages, the Northern Yuan dynasty continued to adhere to its nomadic customs.