First of all, I'd like to say that I'm a little new to Total War games. I have RTW and M2TW and I have spent hours on both of them. I've spent some of those hours getting familair with both.
Then I noticed that horse archers have the "Cantabrian Circle" ability which has them run in a circle while shooting. The enemy AI even actually managed to use this ability to circle around some of my units.
What is the advantage of the cantabrian circle and have you ever mangaged to circle an enemy unit?
I've tried, but it seems impossible.