In Late Antiquity, what seemed to sedentary civilizations like an avalanche of nomadic invasions, mostly from Central Asia, began.
There are ample discussions about climate, imperial policies and internal development attempting to explain this. I know our knowledge is limited.
There have been many alternate scenarios on the seam of steppe and Empires, e.g. Practical Lobster's great Rise of the White Huns, but does anyone have an idea for a steppe-internal PoD which would make a difference to world history? Do they all just lead to differently named hordes appearing at the Gates of the Empires? Or would it indeed make a difference if, say, a differently structured group than OTL prevailed in, say, Sogdia?
any ideas?