It's about the Great Dream Rebellion.

 -The Khitan refugees who were chased by Mongolia said they would fight when Goryeo invaded, but Choi Yi was sent to exile by the Yeomong Allied Forces (Koryeo was an old soldier who defended the border) to destroy Khitan refugees (Koryeo's long-lived bird and Mongolian kachion formed a righteous brother). -Starting Mongolia carefully treated Goryeo.However, when he recognized the reality of Goryeo, he was rude, such as infinite requisition and armed entry into the palace. In the meantime, he was killed by a low-interest woman who came to Goryeo (Dongjin-guk committed).The attack on Goryeo, knowing that Mongolia considered it. -The first invasion of Uiju immediately surrendered (Cho Sook-chang, son of Cho Chung, surrendered), and passed without much damage.But he resisted in Cheolju. Massacred. The Mongolian army returned home but was canceled due to excellent defense (admiring Mongolia's longevity).The main army bypasses and the Mongolian squad attacks the independence of the rear, but fails (At this time, the general tried to kill Choi for surrender to Choi Chun-myung, but the Mongolian envoy saved him). After that, when Anbukseong Fortress was captured and Mongolian troops came to Gaegyeong by barely blocking it at Dongseon Station, Choi's regime surrendered.Mongolia leaves 72 people worth handling as a sign of surrender. - During the first invasion of Ganghwado Island, rumors of Ganghwado Island came out.At this time, when the Mongolian envoy killed the official because of the negligence of hospitality, the discussion began.Most of them are against management, but Choi is forced to go to Cheondo.At this time, he tried to kill Darugachi, but the northwest residents rebelled and failed. A number of civil disturbances occurred after Cheondo Island in Ganghwado Island.At this time, spreading false rumors that a man named Songlipjang escaped from the Mongolian military camp and invaded on a large scale. -Second, of course, Mongolia should not make excuses about Cheondo with the words of the Songnipjang, but come out of Ganghwado Island. 2. Is it true that Daru values were arrested and tried to kill them? 3. If you want to surrender, get out of the island and greet us, and if you don't like it, let's mobilize the army to fight each other! La Hillchaek. Therefore, Goryeo 1. All the people were scattered and hid due to rumors that Mongolian troops were invading. In order to procure tributes requested by the great nation with not many people, the remaining people must be gathered in Ganghwado Island. I don't mean anything else. 2. They ordered the Darugachi people stationed in Gaegyeong and Seobuk-myeon to treat them generously, but I don't know what happened. 3. I'm sorry I couldn't tell you in advance about my trip to the island, and I have a consistent mind to surrender, so please understand. Answer Ra, but in Mongolia, 1. The king comes directly, or send Choi Young-gong (Choi Yi). 2. Accurately present the requested tribute. 3. Send Cho Sook-chang, and send the pine forest together to find out the truth. 4. Send troops to cooperate in conquering Dongjin-guk. 5. Accurately count the number of households and report them. 6. The words of the Songlipjang are false. What's the real reason for being calm? Are you trying to fight with us until the end? I replied. Again, Goryeo 1. As we wish, but we cannot empty the throne for a day, so please understand the difficult situation. 2. Although it was prepared sincerely, only the sincerity was expressed because there were few offerings collected by a small number of people. I'll send it additionally next time. 3. It is difficult to send Cho Sook-chang after returning from Sangguk (Mongol). He was surprised by the words at the Songnipjang, but when he knew that it was not the will of the merchant, he asked for the crime and sent him to a distant island, but the news was cut off due to the severe waves. 4. We are originally a small country, and there are few soldiers left in the war, and those who survived are injured and sick, so please understand the situation. 5. Most of the people fled due to rumors that the great army was invading, and the mountains and fields turned into lush grass fields. If you allow the existence of the state, I will gather the remaining people to serve the great nation. 6. It is to gather the remaining people to serve the Sangguk, and there is no other meaning. Rahana attack because Mongolia was angry at repeated avoidance answers. However, when Salitai died by Kim Yun-hu in Cheoinseong, retreatment. -Many large-scale civil unrest occurred after the third second round.At this time, a man named Hong Bok-won caused a rebellion, and in the process of suppressing it, he killed an innocent Cho Sook-chang.Of course, it was not intentional, but this broke the peace that was maintained formally. Choi Yi built a palace in Ganghwa and held his own government post. The beginning of the third invasion of Mongolia in 1235.Among the three wave attacks, Hwangnyongsa Temple was burned and damaged a lot.Eventually, Mongolian envoys were sent to Ganghwado Island and documents of surrender were sent.The war barely ended in honor of the Mongolian envoy's hard work.However, the king's relatives demanded by Mongolia were postponed here and there.Since then, Choi has conciliated the bureaucratic group and reduced some of the taxes of the people, but it is only a stopgap measure.Eventually, he started to print the Tripitaka Koreana. -The 4th Mongolia stopped sending envoys and attacked Goryeo, but withdrew when Goryeo sent envoys and killed the nine children. -The middle Choi died and Choi Hang came to power.However, it seems that the response to Mongolia is based on the rule of thumb. Later, when Monkekan ascended the throne, he asked for the king's joining, but he refused, saying the king was old.At that time, Princess Yeongnyeong, who went to Mongolia as a hostage, sent a letter after 10 years, asking to join the king or send the prince or his younger brother (Prince Yeongnyeong went to the hostage, but his political status was great, such as marrying a woman in the Mongolian imperial family).The contents are similar. However, Choi Hang refuses to let go of Prince's younger brother. Eventually, the Mongolian army, which came down preparing for the 5th invasion to the 5th Battle, sends envoys and send them hostage 1. 2. The king should join the army. 3. Investigate and report the household. 4. Set up a counterattack. 5. Support the military and the military. 6. Install Daru Value. Sending the contents of (1/2 is the king's father, 3 is tax, 4/6 is for surveillance, 5 is for money of course), thus avoiding.Eventually, the attack starts.In the meantime, Kim Yoon-hoo succeeded in Mercury again in Chungju, which caused some damage due to Korea's unique guerrilla war (no regular troops).