I think Genghis Khan has a proud generation, with many sons, the most famous of which is the fourth son. Among them, Chahetai was outstanding in ability, and finally he did become an emperor as he wished. Unfortunately, he died in Vienna. It is said that he killed his fourth brother Torre, but Torre's son finally succeeded Chahatai to the throne.
First of all, there must be struggles where people live, which is normal. There are too many things that brothers fought in the past dynasties, and everyone is familiar with the change of Xuanwu Gate. In fact, even ethnic minorities and we Han people face the same throne. For example, modu chanyu, even his own father can be killed by himself, just for the sake of the throne. Therefore, on the road to imperial power, it is common to step on a brother's bones.
In fact, when they treat their brothers, they still behave like brothers, friends and brothers in front of their father Genghis Khan. So Genghis Khan won't have too many ideas. After all, he is both their father and their monarch. In order to arouse unnecessary suspicion, he basically maintained a hypocritical friendship in front of outsiders.
Unless there is war, I think the relationship between Chagatai and Torre is actually not very bad, because Torre was not as old as Chagatai when he died, otherwise, after the death of Chagatai, Torre's son will not be allowed to inherit the throne.
I don't think that Chahetai has actually done absolutely in the dispute over the establishment of protected areas, and there is no particularly serious intrigue. It's just that after Torre's death, all the particularly radical supporters were executed by him, and the others were harmless. Otherwise, dad's son has no hope of inheriting the throne.
Generally speaking, although struggling, it is not too bloody. After all, the Mongolian empire is really too big.