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:) Hehe, it's the other way around. In the POVELITELI ORDY faction, there are Orcs, and in the VLADYKI SEVERA faction, there are Dwarves...

This is probably because eXeCuToR was in a hurry and mixed them up.
ManDalay, in the first Heroes 5, there are 6 campaigns for each race. In the VLADYKI SEVERA, there is a continuation with 3 campaigns: Humans, Dwarves, and Dark Elves. In the POVELITELI ORDY, there is also a continuation with 3 campaigns: Necromancers, Orcs, and Mages. This is where the whole story should end.