“The Wolfenstein Challenge” – “Partisans” [2nd campaign, 3rd mission]

If you know where Helmar wants to go, the quest is easy to complete. You get soldiers as a reward.

Alternative units can only be recruited when playing through the Tribes of the East campaign. I don't know if there's a mod that allows you to do this in version 3.1? I played through it in version 3.0.

Mod with the added "Skill Wheel": http://heroes.ag.ru/heroes5/mods/