Goryeo practiced the four majorities close to the Song Dynasty, but it was not because it was weak. They were the military powers of Dongi, who inherited Goguryeo's spirit-1-

 I'm going to combine the books and the knowledge I've learned so far into a series. I hope you can share the advice, intellectual knowledge, and their thoughts in the history gallery. "Just as you can achieve a beautiful canvas by putting each piece of puzzle together..."If we match the fragmented history one by one, we can achieve more than half a million years of proud history of our country." -I like the brown sky. -When we learn history from elementary school. Since the Goryeo and Joseon Dynasty, it has been said that he has always been in the position of his servants while being in China. This can be said to be the result of China, which has always been the center of the world, cutting down the truth in its own history books, describing only practical history, and always erasing the stain. I don't know if the truth will be revealed one day... There are a lot of hearts wanting to know the truth. It's just unfortunate. Lee Yoon-seop, who wrote a book about Goguryeo, and the authors of other books also mentioned Goryeo as a military powerhouse.〃 "Goryeo definitely succeeded Goguryeo and established Balhaein, who is said to have succeeded Goguryeo, and always worked hard to restore Goryeo's Goto," is a fact that all citizens who have learned Korean history know. In Lee Yoon-seop's book, several historical sources are used to talk about the defense power of the Goryeo Dynasty, for example, Goryeo effectively used the conscription system (conscription system) and even the son of Goryeo was obligated to serve in the military. And as the invasion of the aftershocks in the 12th century of Goryeo became more frequent, it was difficult for infantry alone to deal with them, so Yun Kwan recommended a new military organization, 11 units, and Singi-gun (thinking that it might be the main infantry and monk soldiers). It was a national organization in which merchants and slaves were mobilized, with aristocrats and farmers at the center. Singi-gun consists of "people with horses" from Munmusangwan and Seori to merchants, old uniforms and ordinary people. Hang on. If I were to add my thoughts... Textbooks and other books show that horses were exported to Goryeo in aftershocks and Kitan. In addition to those who have horses by purchasing horses from the royal court, they may have bought horses separately to form a group. Shingi-gun included not only the mountain officials of Munmu, but also the descendants of Jaichu (Jaeshin of Jungseomunha-seong and the central source). Since most of the recitals were tattoos, the disciples of high-ranking tattoos were also recruited. This ignores the political privileges of the Moonbeol noble class during the Goryeo Dynasty, which shows that one of the purposes of establishing the Valmuban was to take control of tattoos using the wartime system. Goryeo also used the war system, which was unstable due to the invasion of the Khitan and aftershocks, to bring together aristocrats to form an army of the country for the purpose of war, and to facilitate military conscription without being conscripted by aristocrats.) These organizations of Singi-gun are renamed Bukyong (Northern Orangkae, Mongolia, Georan, Yeojin, Dolgwol, etc.), or Manchurians (malgal scattered after the fall of Balhae, where Malgal is called Yeojin).The purpose was to check that the party's division and the collapse of the sudden collapse set the stage for growth, and both the North and Manchurians were threatening Goryeo, so I think it is because Byeolmu-ban, especially Singi-gun, is in charge of Goryeo's power as the main force. As the saying goes, "Eye for eye, tooth for eye," Goryeo was able to prevent aftershocks every time and establish itself as a military powerhouse in the East with the tactic of orangas riding horses and harassing our people.