>>40659
It's really wrong tho.
I'll return to this in length but just read up on the Mongol conquest of the Rus'. Or the Hungarian campaigns to Western Europe and Byzantium (I think you can find an uninformative Wiki article searching "Hungarian invasions", but it will more than nothing).
But let me ask you: how do you imagine can make war with your mom, wife, kids, and parents/grandparents on your back with all your earthy posessions under your armpit? You can't.
Also let me remind you steppe people served as mercenaries in all the wars of the people living just over their borderlands (Chinese, Iranians, Byzantines, HRE just for a couple of examples) since the age of Scythians. These were organized units of soldiers, and not a tribe of civilians fighting out of necessity.
Yes, I also did read such an opinion what you wrote expressed by an (Anglo) historian, it's the most idiotic thing since one of them a prof at an illustrious uni was able to say that the Huns did not know the wheel...