One of the little challenges for old men like me who game with little men like these 6mm Heroics and Ros figures is finding a way to make it obvious from a distance which little horde is which. One of my helpful solutions is to base the individual figures in easily recognizable patterns. They may not be historically accurate, but sometimes history takes a back seat to playability.
Also, the edge of each base is painted a unified red to make it crystal clear which army they belong to. Initially, with two armies, it shouldn't be necessary, but moving forward, if I can build up enough forces to play with more than two armies, that color code may come in handy.