The commissioner asked for two soldiers in armor, from same country--but different time periods.
They're from a fantasy setting, but he had influences in mind: The left one is drawn mainly from 10th century Europe, and the right a mix of 16th-century Europe and feudal Japanese. Dragons were to be an overlying motif.
His writings on this country are over here at his Deviantart account: http://vassal-of-bahamut.deviantart.com/
