Well, in the timeline I'm working on, one of the major PODs is that Temujin (Genghis Khan) gets killed in 1201 from an arrow-wound. (He got this arrow-wound in OTL, but survived it.) Jamukha takes advantage of this situation by absorbing the tribes under Temujin into his own force. (He also kills all of Temujin's family members and generals, to destroy any threat to his power.)
Well, what next? I was originally going to have him easily defeated after a few years (the Jurchens send one of the Steppe tribes he doesn't unite against him when he becomes too much of a threat), but it would be much more interesting if his uniting of the Steppe tribes actually had more of an effect on the timeline than simply negating all the effects of Genghis Khan and his successors in OTL. Though with Jamukha in charge, the effects are bound to be a lot smaller: I don't see a Mongol Empire created by him reaching from Russia to Persia to China, for instance.
What might Jamukha attempt to do after uniting the tribes? What would be feasible for him to successfully accomplish?
Well, what next? I was originally going to have him easily defeated after a few years (the Jurchens send one of the Steppe tribes he doesn't unite against him when he becomes too much of a threat), but it would be much more interesting if his uniting of the Steppe tribes actually had more of an effect on the timeline than simply negating all the effects of Genghis Khan and his successors in OTL. Though with Jamukha in charge, the effects are bound to be a lot smaller: I don't see a Mongol Empire created by him reaching from Russia to Persia to China, for instance.
What might Jamukha attempt to do after uniting the tribes? What would be feasible for him to successfully accomplish?