a question about Hayasdan soldiers

[Hax]

Just about the Supreme Leader of all that is EB.

EDIT: Well, actually..that's not exactly true. You had khelvan who is no longer active, and Steppe Merc and then there's Aymar, who is still around, I think. Teleklos Archelaou and Krusader seem to manage the team now, but I don't know whether they are specialised in eastern history. It'd be best to either ask Foot or The Persian Cataphract.