Yes indeed. I also exist in the Fall From Heaven 2 forums at Civfanatics. Tasunke is the strongest horselord of the Hippus tribes. The hippus are a nation reborn after the age of ice, that has culturally existed back in the Patrian Age.
The hippus are a Husbandry based economy, and their classic staple is sheep. Therefore they live on the foot-hills of a great mountain range, for the most fertile feeding grounds for their sheep and cattle.
All hippus are at home in the saddle, and the hippus were the first to invent stirrups, so they could use powerful bows while on horseback by standing up during the ride and unleashing archer fury.
For a time after the rebirth, the hippus tribes were disorganized, and usually fought amongst themselves over grazing fields while the larger and more organized empires encroached around them. Finally a young girl named Rhoanna, after the death of her father, found an idea within herself to unite the hippus tribes.
She confronted Tasunke (the strongest) and the other hippus horselords to stop their bickering and fighting. Eventually Rhoanna was able to convince Tasunke (mainly through insults at first, to garner his attention) that a new order of the hippus was long over due. Once she was able to convince Tasunke, all the others pretty much followed Tasunke anyways, so the debate was over, and Tasunke put his own twist into it ... for publicly and as a figure-head, Tasunke is as much a king of the hippus as their ever will be.
This new Idea is to become a Mercenary federation, selling their battle-prowess to the highest bidder. Payment will come in gold, land, and technology. While the hippus may be one of the smaller nations, their fighting ability is un-matched by the other nations. They are known for flying in, causing devastation, and flying out, wether victorious or narrowly defeated.
As they fight to gain succor with larger empires, they eventually forge their own empire of merit as the winnings from their mercenary work help to build a new organized hippus nation.
Initially the Knight replacement for the hippus was the Windrider, which had several air-based abilities, including maelstrom, and also incredibly fast and very high withdrawal (flanking skill). It was a slick look, and the wind-riders had ornamental wings attached to their steeds (at least im pretty sure the wings weren't functional).
In the "real life" as it were, Tasunke Witka, who lived in the 1850s and 1870s, in North America (South Dekota) was a Native American, and probably fought "cow boys" at least from time to time. He was very spiritual, and believed strongly in the power of nature, Especially wind and storms. Tasunke Witka is also known as "Crazy Horse" which is probably a more familiar name.
I believe he, too, primarily fought on horseback. It is a picture of Crazy Horse that is currently being used as my avatar.