oh yea never thought about the fact that single player has more than 6 levels these days.
Yea if you want to know what commanders can do just check out: https://www.warlight.net/wiki/Commanders
Quick summary of what is standing there:
- Commander is worth 7 armies
- Commander won't lose or gain strengh during the game.
- If you lose all your armies and the strengh of the Commander (all 7 commander units dying) you will be eliminated from that game