I am playing a campeign, and I have to much money and was upgrading some legions where I replaced light cavalry with heavy cavalry.
I put all the left over light cavalry in one army and just for fun sake I complemented the army with more light cavalry, since I didnt know what to expect I didnt add a general in case the all cavalry legion would show a poor performence.

This army was attacked by the huns, the light cavalry legion was spread out like a line with a diamond square in the middle. I decided that since some of the other units had spearman I would attack the units in teams of 2 cavalry units, working my way from the hun's outside inwards. I found that I could attack a lot of their army this way... well to cut things short... I massacred the huns, in seconds.. it was incredible, I didnt even had big losses.

After crushing this army the second hun army attacked me... they were given the same fate in also a very short time... the same went for their 3rd army... it was unbelievable.. so easy, so fast and for them,.. so devestating.

yesterday I tried the same thing with only 4 heavy cavalry against about 2/3 of a full legion (yes there were a.o. 6 peasant units in it and only one general) and that too was defeated using the same tactic, two pair of 2 units attacking them from the ouside working inwards... I was SO suprised, never realised the power of cavalry... that is different now...

Of course this doesnt work for attacking a city, but as a back up support legion... they move quite fast over the map, distance in a battle or fighting uphill seems to have a lesser effect, and if you loose some men, merge the units and just add 1 or 2, the legion is easily replenished.

try it... and it's an awesome site to engage all that cavalry 20 x 108 + 1 in a battle... pity they didnt have a special sound file for a fight like that... the sound mustbe defning!

enjoy....