Tatar and Yuan

This category is non-Chinese northern and western kingdoms, including Liao (Khitan Turks), Jin (Jurched) who conquered northern China, Xi (Western) Xia (Tangut, their civil administration had some proto-Marxist characteristics), and the Mongols before Chingis Khan. The Mongol Yuan Dynasty in China, built by war, mishandled peacetime and broke up in the face of native rebellion.