Personal opinion of a member of the History Club - Where did the Goguryeo people go?

 Basically, the root of Goguryeo is the group that maintained life through hunting. It's a living cushion created by the barren environment of Manchuria. Of course, meteorologically, the climate zone at the time Goguryeo appeared in Manchuria was warmer than it is now, but I understand that agriculture is too much to be activated. Goguryeo people could never have given up hunting to make up for the lack of grain.   Goguryeo continued to fight wars for nearly 200 years before its collapse. There will be countless large-scale wars, including the attack on the Korean Peninsula and the Sudang War. If such a fierce war breaks out, of course, the average life expectancy of contemporary men will drop sharply. At the end of World War II, Germany recruited boys who couldn't even graduate from high school and drove them to the battlefield with only a rifle.   Goguryeo cannot be an exception. No, considering the characteristics of ancient society, if a cornered aristocratic group could walk, a boy under the age of 10 would have been sent to the battlefield. If you look at civil war Africa, you can see this well. Of course, he may have voluntarily headed to the battlefield with a strong patriotism. The point of being frozen is that many men, who were only boys at the time, would have been mobilized as soldiers due to the urgent battlefield situation. I think this is natural given Goguryeo's diplomacy in the Sudangjeon to accept nearby nomads as an alliance.   If so, as you know, Goguryeo did not only win one-sidedly against the allowance. Even the war between Eulji Mundeok and Yang Man-chun, called great victories, has a history of tens of thousands of Goguryeo troops lightly melting down into the Jungwon-gun in the early days of the war. This kind of exhaustion of troops would have eventually dealt a fatal blow to Goguryeo's demographic structure. If it had been shared over hundreds of years, it would have passed relatively without much difficulty, but unfortunately, Goguryeo fought too many large-scale wars in over 200 years. Considering that the demographic structure of Joseon changed due to the influence of the rebellion in the Joseon Dynasty, the wounds that Goguryeo had to endure would be beyond imagination.   Men's consumption in these battlefields is bound to ultimately drive Goguryeo's economic production activities to extremes. Otherwise, the shortage of men to engage in agriculture in insufficient grain conditions is fatal to exacerbating the food shortage. Men account for an absolute proportion of production activities that have been hunted or agriculture. Ironically, even if the proportion of women was much higher than now, the difference in production due to the difference between men and women cannot be filled.   However, we cannot exclude soldiers to increase production activities that are insufficient. Due to the collision of the worldview, Goguryeo had to have a certain number of military power unconditionally, and the absolute amount was hundreds of thousands, not tens of thousands.   Eventually, Goguryeo would have always suffered from food shortages for more than 200 years before its collapse. Then there's a problem here. In the end, someone should not eat due to insufficient food and who will starve? You can also think of sharing it in the 12th generation, but this is still the case of rich upper class people, and the vast majority of the general public must eventually starve. In the end, the people chosen here are bound to be the elderly and the weak. Men who will be mobilized for food production and troops cannot help but eat. Eventually, the elderly and women starve. Hunger is also a big problem for older people, but starving women causes a very big problem. Men can always be in the ranks of population growth if they are fed a few days full, but women are different. Once a woman's body collapses, it is not easy to recover.   If we think that the hardships of women who have to give birth have continued for nearly 200 years, the population of Goguryeo during the end of the year will have declined very sharply, contrary to our guess.   In addition, in addition to the unfortunate food situation, as Pyongyang fell and the central body of the central government disappeared, Goguryeo immediately collapsed another core.   It's the distribution system. It may be thought that the lack of food but the system of providing support in places that are difficult to afford may have caused the collapse of the distribution system at the same time as the fall of Pyongyang, forcing places that lack food to just die. You have no choice but to move forward with vegetative muscle skin.      If the above three food production overlaps with the departure of men, the exclusion of women from food distribution, and the blocking of distribution due to the fall of Pyongyang, the population decline will inevitably be faster than just a plane falling.   In the end, I think that the number of Goguryeo people was already extreme at the time of collapse, not at the same level as in a fantasy novel.      In addition, I believe that Goguryeo's collapse was already at the end of its destruction at the time of attack after the recommendation beyond the issues of public diplomacy, diplomatic issues on the Korean Peninsula, dictatorship of Yeon Gaemun, and its successors. However, Dang and Silla only killed Goguryeo just before asa.