Well here's another way to look at it. A general who is rather experienced obviously has had men who've fought alongside him who are capable in their own right. I mean if he's a 5 star general with 4 valour then I'm sure its not all green troops alongside him.

Also, I can't speak for the Medieval Era but most armies and organizations have a command hierarchy as any individual can only manage so many people at one time. There had to have been equivalent sergeants, lieutenants and captains and majors to carry out the general's orders.