In which dynasty did the aides appear?

In the Han dynasty, when the commander-in-chief led the army to war, he had the right to recruit and select civil servants, and set up a government office to assist in handling military and political affairs, which was called "opening the government." Because this kind of government office is located in the shogunate, it is also called "shogunate", and the subordinates of the commander-in-chief are also called "aides" and "curtain posts". There are many kinds of aides, which are equivalent to the "long history" of the modern chief of staff and commander-in-chief; Participate in military aircraft to help direct military operations to "join the army"; There are "main books" and "archives" similar to modern assistants and secretaries, managing documents and various files, and so on.