He then preceded to lead his armies under the Jin Dynasty in northern China in 1211, but did not surrender as quickly as Xi Xia's reign, and the campaign lasted 20 years. Genghis Khan did not forget the Jin dynasty, but he also had forces in western China working against border empires and the Muslim world. He initially used diplomacy (political parliaments) to create trade relations with the Khwarizm dynasty, an empire dominated by the Turkic people that included Turkestan, Persia, and Afghanistan. But the governor of Otrar believed the caravan was a cover for a spy mission. When Genghis Khan heard of this he was outraged and sent a Mongol to retrieve the governor. In an act of defiance, the leader of the Khwarizm dynasty, Shah Muhammad refused the request and sent the Mongol leader back. This act unleashed a fury that would sweep Central Asia