Annihilation of the Tatar Ministry
After several days of cultivation, Temujin gathered his army to continue to pursue the Tatars.
There is a separate introduction to the Tatar tribe here;
(Also known as the Tatar tribe - Tatar tribe) was a large, powerful and wealthy people in the desert steppe before the rise of the Mongols. The many resident pastures of the branch are mainly distributed in the area of Kuolian Haizi (present-day Hulun Lake) and Haizi (Bell Lake).
Among them, there are six branches of the famous and monarchical tribes, namely: the bald and black Wu ti taar, the Alechi tatar, the Tsakhan taar, the Quinta taar, the Theriti tatar, and the Bulu Tatar. A total of 70,000 households. Former vassals belonged to the Liao and Jin dynasties, but most of the time they were in a state of hostility.
Genghis Khan's great-grandfather Ambahai was captured by the Tatars and sent to the Jin Dynasty and crucified on a wooden donkey.
Genghis Khan's uncle, Bahrhei, was killed by the Tatars.
Genghis Khan's father should also be poisoned and killed by the Tatars.

Mongolian historical oil paintings
In this campaign, Temujin for the first time issued the "Zasa" (decree, military order) stipulating that the cavalry charging in the war should stop in front of the headquarters horse formation during the rotation and turn around to continue to charge to prevent the moto formation from being scattered. The property and slaves captured in the war were to be divided equally after the battle in time.
There is no doubt that this will be a life-and-death showdown between him and the Tatars. Dalan pinched the place where Mulgs was decisively determined. In the face of the tatars' numerous tribal coalitions, the Mongol cavalry took turns to charge and none of them retreated. The Tatars fled in complete collapse under the strong onslaught of Temujin's army. However, Temujin did not leave them a chance to escape. He commanded the entire army to encircle and quickly encircle the defeated enemy in the Arashi River and the Lost Rugler River Valley. Almost none of the officers and men of the four Tatar departments (Tsakhan Tatar, AlchiTaar, Theriti Tatar, and Bulu Tatar) slipped through the net and were all slaughtered.
However, some people in his own army seriously violated the military orders he had just issued, and his uncle Talitai's cousin Kucha'er and the Mongol prince Altan did not listen to the orders and began to plunder property and slaves on the battlefield before the war was over. The three of them, who were proud of their noble origins, thought that they would not have to obey Temujin's orders. But precisely because they are close relatives who have violated military law, they should be punished or others will follow suit.
The Temujin faction, Bie and Kublai, confiscated and punished the three relatives for stealing and punishing them, giving them a stern military order.
But this also laid hidden dangers for the three men to defect to the Mongols.
At this point, Temujin's biggest problem was how to dispose of the numerous Tatar captives. He ordered the execution of all Tatar men who were taller than wheels, and the other women, children, old and young, were assigned to the various ministries as slaves. However, the massacre did not go well, and Temujin's half-brother Belegutai thought that his brother's practice was too cruel that night, and quietly revealed the news to the Tatar captives.
All the captives were uniformly driven into a valley where the grass was so densely forested that the birch trees and vehicles on the half-slope could easily form fortifications, which made Temujin suffer heavy losses in the massacre of the next day. After several days of killing, all the men who were taller than the wheels were slaughtered. The Tatars, who once roamed the desert steppes, were completely extinct.
After eliminating the alliance of the Tatar tribes, the only people who could compete with the Temujin Mongols were Wang Khan and Sun Khan.