How to improve the command ability of seven generals in the true three kingdoms

One way is to complete the meritorious military service task in the free mode and complete the corresponding task upgrade command.

Another way is to appoint lieutenants to carry out their abilities (that is, I haven't played specific names for a long time). If the skill is released successfully, you can also add exp to the command, and the first level will slowly rise to the second level, and it will be soon afterwards.