In fact, there is not much exaggeration in the movie. The Mongolians are really powerful in cavalry and bows and arrows. The environment near Moscow at that time was not suitable for cavalry combat. And in the era of Genghis Khan, they had artillery, the kind of artillery that blew up city gates, and then attacked. The Russians are proficient in foot warfare. They have Eastern European blood and are generally taller. And the weather helped them a lot. Of course, there were many civil wars in Russia at that time. Before the Mongol invasion, Russia, called Kievan Rus, had been divided into more than 10 unrelated countries, the largest of which was the Novgorod Republic in the north and the Northeast Vladimir-Suzdal Principality and Galicia-Vorren Kingdom in the southwest. To their southeast, that is, to the north of the Black Sea, the Crimea to the Caspian Sea and the vast expanse of the northern Caucasus, lived the Turkic-speaking Cumans also known as Polovozis or Kipchaks). To their east, the Volga Bulgarians conquered the local Slavs and Greeks and established the Kingdom of Bulgaria. Even the war-savvy Greece was conquered, which shows how strong they are. Various small Rus countries and these Turkic ethnic groups sometimes attacked each other and sometimes formed alliances. Nearly 200 years have passed, and the rest can be said to be old fritters, especially the Bashkirs are particularly warlike. The difference between the Mongolian siege and the battle can be seen from the attack on Xiangyang in the Southern Song Dynasty. It is conceivable that they could not fight for so many years. The army of the Southern Song Dynasty was extremely weak, and the court was corrupt. Most of them are local people on the city wall to defend the city. In the past, the city was not as tall as the movie, and the high city wall was only about 3-5 meters. Although Russia was finally defeated by the Mongols, the National integrity he showed and his unwillingness to be ruled by foreigners was quite good. (Douban Film Review)