I have to say I have never heard of the Malikate of Mazandaran. And a web search turned up nothing beyond the fact that Mazandaran is a region on the Caspian Sea. Part of my girlfriend's family is from nearby (Rasht) and I have never heard about any epic kingdoms from this area during the Middle Ages. Perhaps someone can enlighten me? I do know in the current version of BC, that area of the map is kind of a rebel dead zone. I presume the main reason for this faction is it fills up this dead zone of the map.