Quote Originally Posted by Doug-Thompson
There's an excellent thread in the Medieval:Total War guides section by Ludens, and a brief update by me:

"How to use Horse Archers" in R:TW
Good stuff, I remember HAs were underutilised in MTW by alot of players, including myself! But just from my experiances playing parthia I can say they have been boosted immeasurably, particularly in user friendliness, no more constant zooming about the battle field maknig sure you HAs aren't about to be eaten up by the enemy. I can actually rely on Skirmish mode, something I would never do in MTW.