At the end of the third mission, a script fails. Bertrand doesn't appear, and it's all because of his army of green creatures. I finished it using the console. In place of the green neutrals, there are single peasant units.:D
At the beginning of the fourth mission, Robert has an army of seven archers. There are no mods, and no cheat units.
It's just to show off. A walkthrough of the campaign in this form is not functional and useless.