Tigranes II
Chieftain
Oh, I just found a place for those barbarian hordes! The Ottoman Turks were descended from a steppe people (in fact, only about 600 years before coming to power). They conquered a lot, but they actually contributed something to world civilization (unlike those nasty, brutish Mongols!). Plus, they were in power from the 14th to the 20th centuries, and for 230 years between the capture of Constantinople and the last siege of Vienna, they were definitely a major world power. Hey, and as the "sick man of europe", they can even be in the wonderful Crimean War scenario! On to Sebastopol!
(Oh, and I was just kidding about the Mongols. But seriously, living in a yurt makes anyone crazy)
(Oh, and I was just kidding about the Mongols. But seriously, living in a yurt makes anyone crazy)