Warcraft Total War is a total conversion mod for Medieval II Total War. Our goal is to bring the Warcraft universe into a Total War game. This mod will feature epic battles with units from the Warcraft universe and a new campaign that will cover the events of the Third War and beyond.
The Dark Iron Dwarves shares all their mercs with the other Dwarven faction - Khaz'Modan, but they do have more easy access to the Gnoll Mercs as they're available in the Dark Iron lands.
The Fire Elementals are mercs from Uldum and possibly Ulduar, otherwise they're a part of the Dark Iron faction.