In June of the seventh year of Zhongxing in the Ming Dynasty, under the order of Zhu Cijiao, a large amount of grain, grass and military supplies were transferred to Liaodong and Guangxi, and the armies had already completed the mobilization, and the Ming Dynasty gradually completed all the preparations for attacking Korea and Annam.

Zhu Ci hesitated to take North Korea first.

On 15 June, Zhu Cicheng sent a credential to King Yi Jun of Joseon.

The content of the letter of state is very simple, the Korean state is limited to the two places of Tielingwei and Xianxing Mansion that belong to the Ming Dynasty within ten days, otherwise all the consequences arising therefrom will be borne by the Korean state!

Tielingwei and Xianxing Mansion were originally under the jurisdiction of the Yuan Dynasty's Shuangcheng Governor's Office.

Since the beginning of the Tang Dynasty, it has been the territory of the Han people, five dynasties and ten kingdoms, the Han people have lost the jurisdiction of Liaodong and other places due to the sixteen states of Youyun, but Tielingwei and Xianxingfu are still under the jurisdiction of the Liao Dynasty.

At the end of the Liao Dynasty, the Jurchens rose, and after the Jurchens destroyed the Liao, they established the Dajin State, which still ruled Tielingwei and Xianxingfu.

At the end of the Jin Dynasty, the Mongols rose, the Jin Dynasty fell, the Mongols established the Yuan Dynasty, Tielingwei and Xianxing Mansion took over in the Yuan Dynasty, and the Yuan Dynasty emperor set up the Shuangcheng Governor's Mansion to govern it.

It can be said that since the Tang Dynasty, Tielingwei and Xianxingfu have always been the traditional territories of the Central Plains Dynasty.

At the end of the Yuan Dynasty, Zhu Yuanzhang raised an army against the Yuan, the Yuan Dynasty was worried about internal and external troubles, and there was no time to look eastward, and the Goryeo Dynasty at that time took the opportunity to send troops and occupied Xianxing Mansion before the fall of the Yuan Dynasty, so after the establishment of the Ming Dynasty, the original Shuangcheng Governor's Mansion on the east bank of the Yalu River was left with only Tielingwei. Emperor Taizu Zhu Yuanzhang felt that Goryeo sent troops to attack the Yuan Dynasty, and was embarrassed to mention Xianxing Mansion, so he acquiesced to Goryeo's occupation of Xianxing Mansion.

After getting the Hamhung Mansion, Goryeo was not satisfied, and kept peeking at the remaining Tielingwei land on the east bank of the Yalu River.

In the twenty-fifth year of Hongwu, the then king of Goryeo sent Li Chenggui to lead his troops to attack Tielingwei, and crossed the Yalu River to attack Liaodong and other places in the Ming Dynasty.

After the establishment of the Korean Kingdom, although Li Chenggui respected the Ming Dynasty on his face, he never gave up peeking into the territory of the Ming Dynasty, but at that time, the Ming Dynasty had just been founded for less than 30 years, and it was extremely strong both inside and outside, and the DPRK knew that there was no chance, so it never moved.

However, a white-eyed wolf is a white-eyed wolf, and whenever he has the chance, he will always pounce on it and bite it.

In the first year of Jianwen, Zhu Di, the king of Yan, launched the battle of Jingyan under the pretext of the Qing monarch's side, and the Ming Dynasty entered a four-year period of chaos and turmoil, and the opportunity for North Korea came, and North Korea did not hesitate to send troops to occupy Tielingwei, and successfully advanced the territory of North Korea to the Yalu River.

Originally, North Korea still wanted to continue to attack Liaodong, but after the Battle of Jingyan passed three years, the situation gradually became clear, the victory of King Yan was decided, at the end of the fourth year of Jianwen, King Zhu Di of Yan invaded Nanjing City, ascended the throne as the emperor, changed the Yuan Yongle, and the Ming Dynasty restored stability, and the Koreans understood that the stable Ming Dynasty, they had absolutely no chance, and only when the Ming Dynasty was in turmoil again, they had a chance.

During the Yongle period, the Ming Dynasty's national strength grew stronger and stronger, and gradually reached its peak, and the Koreans completely extinguished their ambition to continue to peep into the territory of the Han people.

However, this extinguishing did not give up forever, just waiting for the opportunity.

In the fourteenth year of Yingzong's orthodoxy, the Tumubao Rebellion broke out, and the 500,000 elite army of the Ming Dynasty was defeated by the tile spurs and suffered losses.

The emperor was captured, the elite army lost most of it, and in October, the army of the tile spurs came to attack the city of Beijing, and the Ming Dynasty seemed to have reached the moment of possible annihilation.

Again, a white-eyed wolf is a white-eyed wolf, and once there is a chance, he will always pounce and take a bite. Taking advantage of the Ming Dynasty's defense of Beijing, North Korea recruited a large number of troops, preparing to gather the strength of the whole country and send 300,000 troops to attack Liaodong after the Ming capital was broken by the tile thorns.

It's a pity that in the end, the Ming Dynasty succeeded in keeping the city of Beijing and repelled the Tile Spur army.

At that time, although the Ming Dynasty was injured, it was still there, and there were Yu Qian, Shi Heng and other capable ministers to assist the court, and the Ming Dynasty gradually restored stability again, and the stable Ming Dynasty was not North Korea dared to peep.

North Korea twice took advantage of the civil strife in the Central Plains to gain control of Hamhung Mansion and Tielingwei successively, and then took advantage of the capture of Yingzong and wanted to send troops to attack Liaodong.

For the existence of North Korea as respectful and loyal as a vassal of the Ming Dynasty, but secretly playing the role of a white-eyed wolf, Zhu Ciji has long been displeased.

Originally, Zhu Ciji only mentioned Tielingwei, but Tielingwei only had three counties and twelve towns and some barren mountains and mountains, and Zhu Ciji was worried that the Koreans would choose to compromise, so that Daming would have no excuse to attack. However, Hamhung Province is four times the size of Tielingwei and has a much denser population than Tielingwei, and Tielingwei and Hamhung Province together occupy almost one-fifth of North Korea's territory, and it is expected that North Korea will not compromise easily.

Therefore, Zhu Ciji not only mentioned Tielingwei, but also mentioned Xianxingfu, which was originally the territory of the Central Plains Dynasty anyway, and should not have been stolen by North Korea repeatedly taking advantage of the fire. If North Korea is smart, reacts quickly enough, and compromises quickly enough, it will be fine if it doesn't give Zhu Cihean an excuse, but Zhu Ciji expected that North Koreans belong to the kind of people who don't shed tears when they don't see the coffin, and they will definitely not compromise easily. If you think about future generations, you will know that the arrogant and inferior North Koreans, who say everything as their own, and wish that the whole world is their own, can so easily spit out what they think is their own.

Sure enough, as soon as the king of Joseon received Zhu Ci's letter of state, he was immediately so angry that his face turned pale.

"Ridiculous, ridiculous! How could Da Ming do this! A North Korean official held the Ming State Book that was circulated to him, and his hands trembled with anger: "My North Korea has always respected the Ming Dynasty as the Shangbang Dynasty, paying tribute every year, and being loyal to the Ming Dynasty, and the Ming Dynasty broke off the vassal relationship with my North Korea more than two years ago, how can I still peep into my North Korean territory, it is really unreasonable, ridiculous, really ridiculous!" ”

This official said it rightly, he seemed to have forgotten that Tielingwei and Xianxing Mansion were originally stolen by them in North Korea, and now Daming is planning to come back, what is not to do.

"Not only Tielingwei and Xianxing Mansion, Liaodong and other places are also our Koreans, all of them are our Koreans, but they were only occupied by the Han during the Tang Dynasty, and the Ming Dynasty should return our Liaodong and other places!" Another North Korean official said.

The Korean official was referring to the Goguryeo Dynasty in the early Tang Dynasty, when the Goguryeo Dynasty dominated Liaodong and was later destroyed by the Tang Dynasty.

The North Korean official also forgot that Goguryeo was originally a local minority in Liaodong, and although it occupied a small half of Liaodong, the capital was still on the north bank of the Yalu River, which belonged to the Liaodong region, and it was a real local dynasty in Northeast China, and there was nothing to do with Koreans at all.