And did they use the same tactic too? I.e. attacking (obviously on horses, if someone might not know), then pretending retreat, and while enemies are chasing us, shooting arrows backward (and defeating them). It's hard to estimate (at least for a non-historian like myself) how many "battles" we won with this tactic (we practically pillaged through half Europe), though the German armoured knights taught us a lesson in 955 during the battle of Augsburg (Lechfeld).
It seems to be one of these "natural strategies", actually - the kind of thing that you invent if you've got lots of light cavalry and good archers. The Mongols did it a lot in the 1200s, in Europe and Asia, and basically walked all over the European armies. In fact, I think the same basic technique gets used in tank warfare - both Rommel and George Patton are supposed to have studied Genghis Khan's strategy.