When Stalin was determined to expand the Mongolian troops in the Red Army, an unexpected news completely disrupted everything. On August 1942 and 12, the army group in southern Germany conquered Estana, the capital of Kalmyk Autonomous Republic of the Soviet Union. In order to win over the brave local Mongols, the Nazis demolished the collective farms, "returned" the land to the Mongols, and promised that the Mongols could finally establish their own country. Finally, three local elders surrendered to Germany, and took the initiative to help German commander Marshal Maximilian von Weichs form a "Dor Mongolian Group" composed of 103 Mongolian battalion and 2,200 Mongols. Stalin flew into a rage when the news that the Mongols helped the Nazis reached Moscow. He urged the Presidium of the Supreme Soviet to issue an order on February 27th, 65438, revoking the Kalmyk Autonomous Republic, making kalmyk Mongolians a "traitorous nation", and forcibly exiled120,000 ethnic groups (except those who joined the Soviet Red Army) to Siberia, Central Asia and Kazakhstan.

At this time, the Soviet Union's battle on the front line of Stalingrad also entered a critical moment. Tanks consumed more than half of Soviet troops, and cavalry was urgently needed as an important assault force. However, the Mongols who are most suitable for this role are classified as traitors, which puts the Red Army generals in a dilemma. At this delicate moment, Gorodovikov, the former head of kalmyk Cavalry Corps, risked his life and asked Stalin to keep a Mongolian army. He swore with his life that the Mongolian army in kalmyk would always be loyal to the Soviet country. Finally, Stalin agreed to Gorodovikov's request, but limited the number of troops to 2,000.

1 In March 1944, the Mongolian cavalry regiment directly under the jurisdiction of the Soviet Guards1Cavalry Corps was formally established, headed by Gorodovikov, who was already a general, and was the only Mongolian unit of the Soviet Red Army in the middle and late World War II. In order to boost morale, Gorodovikov asked the soldiers in the regiment not only to play the Soviet flag, but also to hold high the spiritual banner of Genghis Khan's era-Suled. Sulud is made of mane cut from the best stallion and tied to the edge of a spear as a tassel. Every time the soldiers set up camp, they inserted Sulud outside the camp gate to show their identity. According to the Mongolian soldiers, Suled fluttered in the wind, captured the power given by the "eternal day" and passed it on to the soldiers. It is said that when the soldier was alive, Su Laide dominated his fate; When a soldier dies, his soul will be attached to Sulud, inspiring generations of future generations. It is under the call of strong sense of honor that this Mongolian army is full of fighting spirit. Marshal Butioni of the Soviet cavalry said during his inspection of the Mongolian cavalry regiment: "This is a dynamic army, and the cavalry expects' Okahan' (as the soldiers privately call Gorodovikov) to lead them to sweep the enemy's nest."