In the fifteenth year of Hongwu (1382), the pro-army Dewey House and Yiluan Division were abolished and changed to Royal Guards.
What I read in ancient books at that time was that the Royal Guards were very powerful. After the emperor's personal training and long-term training and supervision, each of them has the ability to be independent. Coupled with some reward and punishment systems and time experience, it became the most powerful spy army in the Ming Dynasty. By the late Ming dynasty, the country was corrupt, politics was broken, and every corner of the government was eroded by the outside world. During the Ming Dynasty, internal troubles and foreign invasions also affected the Royal Guards.
Another thing is that the emperor didn't trust everyone at that time. He thought that the Royal Guards had been eroded by the outside world and ignored them. Although they were representatives of power and supervision before, with the darkness of the court, the distrust of the emperor and the resistance of the people, the demise of the Ming Dynasty was accelerated. Over time, the Royal Guards tried to help the country rebuild, but to no avail.
I personally like the Royal Guards. I once dreamed that there was such a loyal team that I could drive, but that was just thinking. But if the Royal Guards of the Ming Dynasty were used well, I don't think they would have died so easily.