WORLD HISTORY

Detailed explanation-1: -The great enemy of the Chinese was the Mongols who lived to the north. They even built a wall thousands of miles long to try and keep the Mongols from invading. The Mongols did conquer China for a time, however, and established their own dynasty called the Yuan Dynasty.

Detailed explanation-2: -The Mongol conquest of the Jin dynasty, also known as the Mongol–Jin War, was fought between the Mongol Empire and the Jurchen-led Jin dynasty in Manchuria and North China. The war, which started in 1211, lasted over 23 years and ended with the complete conquest of the Jin dynasty by the Mongols in 1234.

Detailed explanation-3: -The World Conqueror In 1207 the Mongols began operations against the kingdom of Xi Xia, which comprised much of northwestern China and parts of Tibet. This campaign lasted until 1210, when the Xi Xia ruler submitted to Genghis Khan. In 1211 he led his armies against the Jin dynasty, which ruled northern China.

Detailed explanation-4: -In subsequent campaigns the Mongols relied even more on the sophisticated skills and strategies of the increased number of Chinese under their control. After 1215 the Jin were reduced to a small buffer state between the Mongols in the north and Song China in the south, and their extinction was but a matter of time.

Detailed explanation-5: -The wall was built to help keep out northern invaders like the Mongols. Smaller walls had been built over the years, but the first Emperor of China, Qin Shi Huang, decided that he wanted a single giant wall to protect his northern borders.