The demise of the Ming Dynasty came from internal and external troubles.
Li Zicheng, a big bandit leader, led a group of peasants, like a swarm of locusts, to the land where there was no grass, with a million troops, shouting that "the king has come to pay no grain", all the way to the city of Beijing, forcing the Chongzhen Emperor to die on the coal mountain, and becoming the emperor himself.

But a bandit is a bandit, and even if he has his own program, he is still a bandit, and he cannot become a climate.
Let's see what Li Zicheng did after he entered Beijing.
Preparing for the registration ceremony, letting the world's mess not clean up, thousands of miles of rivers and mountains are full of smoke, no matter, he has played the trick of being an emperor in Beijing city to be addicted to the emperor, do you see that this is a serious tyrant who should do?
Although he became the emperor, he was still an uncompromising peasant in his bones, and after entering the capital, the woman who lived in the emperor's palace and slept with the emperor began to put up the emperor's stinky shelf.
In addition to himself, the people under the opponent were also, letting them burn and loot, strict military discipline, nothing at all, which was the exact opposite of what he promised before entering the city, it was completely without a long-term plan, or the original faction that ran after the fight.
Li Zicheng is best known for robbing Chen Yuanyuan, and then Wu Sangui rushed to the crown and became angry, and offered Shanhaiguan to the Qing army, the Manchu Qing entered the customs, Li Zicheng fled in a hurry, and the city of Beijing changed its master.
Whether Chen Yuanyuan's story is true or not, but Li Zicheng's treatment of these border guards is indeed not in place, and he does not take them seriously, and the group of generals under his command, Liu Zongmin and the like, are not at any level, all of them are mud legs, and the poor people's mentality is naturally inflated, not only robbing Wu Sangui's woman, but also beating Wu Sangui's father.
The Wu family was outside the Guan, and it was also a figure with a head and a face, not to mention that he still had the main force of Guan Ning Iron Horse in his hand.
Wu Sangui and Li Zicheng got on the road, and Li Zicheng had just taken the city of Beijing, and felt that these officers and soldiers of the Ming Dynasty were all native chickens and tile dogs, leading hundreds of thousands of peasants to go to Shanhaiguan. Can it be beaten? Beaten fart rolling urine stream. The later thing, that is, the good Jiangshan, was transferred to the Manchu Qing.
Li Zicheng did not have a climate, but the most infuriating thing is that from beginning to end, he was a small peasant thought, and he did not consider the Chinese nation at all, and finally the Manchu Qing Dynasty entered the customs and became the rule of foreign nationalities, which can be said to be the greatest humiliation in thousands of years.