The history of the Joseon Dynasty is traced back: At the end of the 14th century, the Lee Dynasty was established, ruled by Confucianism, and the daimyo was the suzerainty, and successive kings accepted the canonization of daming. During the Ming Dynasty, Daming sent troops to help Korea repel the attack of Toyotomi Hideyoshi, and at this time, the emperor in Joseon's heart was only The Great Ming Son.
However, the rise of Houjin broke this situation, and in 1619, the "Battle of Salhu" between the Ming Dynasty and Houjin was completely launched, and as a vassal of Daming, Korea also sent troops to aid Daming, and finally claimed that a total of 470,000 troops attacked Houjin. However, in the end, Nurhaci won more with less and destroyed the three-way army of Daming, and the losses of Korea were naturally quite large, but the Korean king Li Qiang still had a strong sense of belonging to Daming, and it allowed Daming to send troops to station in Korea.
Emperor Tai Chi
For Hou Jin, Korea was like a fish in the throat behind him, so after Emperor Taiji came to power, he sent the general Amin to attack Korea, and Amin sent a large army to plunder south while waiting for the peace of the King of Korea, and Amin's army would successively capture Dingzhou, Anju, Pyongyang, and Zhonghe stopped advancing. At this time, the King of Korea had to come to negotiate peace, stipulating that Korea should give gifts to Houjin, treat Houjin's emissaries with courtesy, not build a city to train troops, and not take in Houjin's fugitives, but Korea insisted on retaining its clan relationship with Daming, and Amin was forced to agree to the oath of alliance when he was about to retreat, and the war was also called "Ding Wei Chaos". After Houjin retreated, the Joseon Dynasty immediately played the plot of Chen's military campaign to Daming, and the Chongzhen Emperor also expressed his understanding, because of Houjin's barbaric behavior of burning and looting in Korea, the Dprk was extremely disgusted with its interaction, delaying the payment of tribute, and the relationship between the two sides was once again rigid, leading to the second war.
In 1635, Emperor Taiji defeated the Mongol Lin Dan Khan, obtained the Yuan Dynasty National Seal, and prepared to claim the title of emperor. In 1636, Emperor Taiji officially declared himself Emperor, changed the name of the country to Daqing, and the name of the clan was Manchuria, and he informed Korea in advance. The DPRK was shocked to hear this, and Li Kuan refused to receive the mission, and the Houjin delegation was insulted by the Korean people. Then, at the enthronement ceremony in Shenyang, the North Korean envoy Luo Xian and others refused to kneel, which completely angered the emperor Taiji. On December 1, 1636, the Mongols received orders from Emperor Taiji and led their troops to Shenyang to assemble, plus the Eight Banner Soldiers, a total of 100,000 people. Emperor Taiji then ordered Daisan the Prince of Li, Dolgun the Prince of Rui, Duoduo the Prince of Yu, Belle Yueto, Hauge, and others to conquer Korea together. In the Korean history books, this incident is called "Chengzi Chaos", this battle, the Qing Dynasty army one-sided victory, the large army into no man's land, Li Qiang can only flee to Namhansan to wait for reinforcements.
Li Qiang
In the end, Emperor Taiji ordered Li Qiang to surrender immediately and must accept all his terms, at this time the Joseon Dynasty no longer had the capital to hesitate and bargain, and could only surrender in front of the Qing army camp, and the Emperor Taiji formally made an alliance on the east bank of the Han River, thus formally establishing the relationship between the Joseon Lee Dynasty and the Qing Dynasty.