Quote Originally Posted by IceWolf
New Rule-If you're playing a HA civ like Scythia, if you're beseiged and hopelessly outnumbered, have any HAs in the town sally forth out of an unopposed gate, then do a flank attack on the advancing beseigers. This will let you take down as many of the swine as possible before the defeat.

on the contrary, of you're playing against a HA civ, ignore (as much as possible) the open field battle and aim where it hurts: take their towns instead of dealing with the horses.
Eventually, you'll end up dealing with groups of rebel HA