At this time, in the last 10 years of Chongzhen's reign at the end of the Ming Dynasty, the Ming Dynasty could still control some territory and army, if Li Zicheng captured Beijing, Chongzhen broke out, where would he go, whether it was Nanjing or Song Gaozong to Lin'an, or to learn from Liu Beitu Sichuan, or to go to the border fortresses guarded by heavy troops, such as Jianmen Pass, Yumen Pass, Jiayu Pass, or Jingxiang Land.

And Chongzhen is not that kind of person, he has always regarded himself as the lord of Zhongxing, Li Zicheng is overwhelmed by the army, and the minister suggested that Wu Sangui be transferred back to Beijing to save the car, but he has always regarded himself as the master of Zhongxing and does not want to leave the infamy of giving up Shanhaiguan and the four cities outside the Guan, the minister only understood after several days, and wrote "strongly" to suggest that Wu Sangui be transferred, and Chongzhen was "very reluctant" to give an order, and he was stubborn for his own use.

However, at that time, the internal and external troubles were already a very serious mess, and Qianlong explained that the death was not in Chongzhen but in Wanli. And moved the tablet of Wanli from the imperial temple of the past dynasties, and moved the tablet of Chongzhen into it.

However, at the end of the Ming Dynasty, the people who could be used were all wiped out in the end, and famous generals like Hong Chengchou and Wu Sangui also rebelled, except for a few thousand Guanning iron cavalry, the Qin army, and the Hong army had no combat effectiveness, and it was a matter of time before they lost. The main thing is that Chongzhen will not run away, his final death and crime have been edicted are the dignity of the Ming Emperor, he is not stubborn but for dignity.

Moreover, later, because of the war, the Ming army in Jiangbei had already existed in name only, and basically except for Wu Sangui's Guanning Iron Cavalry, which guarded the Shanhaiguan, almost no army could confront the Li army or the Qing army. If, hypothetical. I think 90% of Chongzhen will go to Nanjing.

Because, Jiangnan was rich At that time, 80% of the food and salary of the Ming Dynasty basically came from Jiangnan, the people of Jiangbei, and Jiangbei was famine for many years at that time. In addition, the peasant army was rampant, and basically no grain could be collected. Moreover, most of the Ming army at that time was also entrenched in the south of the Yangtze River, such as Zheng Zhilong, who was Zheng Chenggong's father, a big pirate, but it was used by the Ming army, Qin Liangyu, not to mention their combat strength, at least there were many people.

Secondly, Zhang Xianzhong of Sichuan, which borders on this, is also a target that can be fought for. Finally, Nanjing also has extremely important political significance, Nanjing was the capital of Zhu Yuanzhang's time, and in the following period, Nanjing has always existed as a companion, and all the political institutions in Beijing, Nanjing also has it.

It is impossible to pass the border pass, since ancient times, no emperor has run to the border pass, they are all under the command of the central government, unless it is a personal expedition by the emperor, otherwise the emperor will not be stationed at the border pass. Although the Ming Dynasty was the Son of Heaven guarding the country, it was impossible to go to the real border. It's all about politics and nothing else. There are quite a few armies that can be controlled (after all, the Ming Dynasty implements a military household system), but the Ming army that can really fight with the Li army and the Qing army does not exceed 200,000.

In addition, the situation in the Ming Dynasty was already very bad at that time, and natural disasters continued in those years, and the peasant uprisings intensified. The government is not peaceful. It is equivalent to a seriously ill patient who competes in boxing with a young man with strong blood, how can he not be defeated. If the Ming Dynasty itself was not in internal chaos, the Qing Dynasty would basically have no chance.

At the end of the Ming Dynasty, the bureaucracy was corrupt, the people were poor, starvation was everywhere, and the financial collapse was caused by not collecting taxes on businessmen and magnates, and it was not normal for such a regime not to perish, and it was not normal for such a regime to perish, in fact, he was mainly a corrupt official in Beijing, and Li Zicheng also reused those civil officials who surrendered, and the surrender of Wu Sangui was also because of the misunderstanding caused by Wu Sangui's nonsense, and later Li Zicheng let go of Wu Sangui's family.

If Li Zicheng and Wu Sangui intercepted the Qing outside the pass, the Qing could not beat the combined army of Li Zicheng and Wu Sangui, and even if it could fight, it would not be able to gain a long-term foothold in the Central Plains, because the name was not right, that was the world of Dashun, and a gang of rabble in the Southern Ming Dynasty was not worth worrying about, but then the Qing used collusion with Wu Sangui to avenge Chongzhen, but the name was justified, and even easily recovered the north, and the Qing Dynasty used the artillery and army of the surrendered troops of the Ming Dynasty to break through the cities and Li Zicheng's base camp Xi'an Tongguan, especially with Wu Sangui and other traitors who brought disaster to the country and the people, I don't know how many Chinese sons and daughters were killed。

However, the war is not over, and it seems that everything has just begun.

In the sixteenth year of Chongzhen (1643), he was called King Xinshun in Xiangyang. In the first month of the following year, the Dashun regime was established, and the era name was Yongchang. The rebel army was strong in Jingxiang and tried to capture the Beijing division. Li Zicheng adopted the strategy of the strategists and first took Shaanxi as a base area. In September of the 16th year, the rebel army and the Ming Sun Chuanting soldiers fought in Jiaxian, Henan, with a deep ditch and high fortress to fatigue the Ming army, and took advantage of the rainy days and the Ming army's grain transportation was not continued, and sent light horsemen out of Ruzhou (now Linru, Henan) to cut off the Ming army's grain road, defeated Sun Chuanting, killed and injured more than 40,000 Ming troops, and obtained hundreds of thousands of weapons and baggage, and Chuanting ran to Tongguan. After that, the rebel army marched into Shaanxi by two routes, all the way through Xichuan Xiashangzhou (now Shangxian County, Shaanxi) into southern Shaanxi; Self-formed will personally lead the army to Tongguan.

In October, the Ming army was defeated and died in battle. In the first month of the seventeenth year, the rebel army conquered Xi'an and took Ningxia, Lanzhou, Xining, Yongchang, Zhuanglang and other places. After the rebel army occupied Xi'an, it officially named the country Dashun, took Li Jiqian as Taizu, changed the Yuan Yongchang, and took the seventeenth year of Chongzhen as the first year of Yongchang. And changed Xi'an to Chang'an. Li Zicheng changed his name to Zisheng and became the king.

In February 1644, the rebel army attacked Beijing in two ways, one led by Liu Fangliang, a general who had entered Shanxi, from Pingyang (now Linfen, Shanxi) through Yangcheng, Yuetaihang Mountain out of northern Henan, first under Weihui (now Jixian, Henan), Zhangde (now Anyang, Henan) and other places, and then through Zhending (now Zhengding, Hebei) to the north, in order to contain the reinforcements of the southern route of the Ming Dynasty; One route was personally led by Zicheng, crossed the Yellow River, went down to Taiyuan, and spread the word to various states and counties to expose Zhu Ming's various crimes. The peasants of Shanxi responded en masse, and the prefectures and counties looked down from the wind, and led their troops north, passing through Datong, Xuanfu (now Xuanhua, Hebei) to the south, and besieged Beijing on March 18.

The next day, they attacked Beijing. Ming Sizong Zhu was hanged in Coal Mountain (now Jingshan). The Ming Dynasty fell. Since then, the Ming Dynasty has begun to be unable to restore the country. Soon conquered Beijing and overthrew the Ming Dynasty, causing Ming Sizong Zhu Youzhen to hang himself in the coal mountain. Due to the victory of the rebel army leader who seized Chen Yuanyuan and forced Wu Sangui to rebel, the Manchu nobles entered the customs......

After Li Zicheng received the news of Wu Sangui's surrender to the Qing Dynasty in Beijing, he sent the Ming general Tang Tong to lead 20,000 cavalry out of a stone (now north of Shanhaiguan, Hebei), detour outside the pass to cut off Wu Sangui's retreat, and personally led an army of 200,000 to the north to attack Wu Sangui on April 13. After receiving Wu Sangui Fei's letter of urgency, the Qing army galloped overnight, and on the 21st, the Qing army defeated the Tang Tong Department in a stone, and then entered the Shanhaiguan.

The next day, the Qing army, the Wu army and the Dashun army faced each other in front of the Shanhai Pass, and the commander of the Qing army, Dolgon, ordered the Wu Sangui army to engage the Dashun army. The two armies fought until noon, just when the Wu army was surrounded by the peasant army and could not support it, the elite cavalry of the Qing army hidden behind the formation suddenly attacked from the right flank of the Wu army and attacked the left side of the Dashun army. The Qing army followed closely and defeated Li Zicheng again at Yongping (present-day Lulong, Hebei).