With all the nomadic tribes united and Genghis Khan securely ensconced as their ruler, it seemed uncertain what should happen next. He had spent so many years locked into the drama with Jamuka and Ong Khan that without them, his large tribe seemed to lack an objective or purpose. Without enemies, they lacked a reason to hold together. Genghis Khan seemed to be searching for new ones, but he found no tribe worthy of the distinction. With no other potential targets, in 1207 he sent his eldest son, twenty-eight-year-old Jochi, and his tumen on a campaign into the area the Mongols called Sibir,
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