what was the function of the Roman cavalry?

[xrubio]

Don't forget scouting - possibly the most important of their functions.

Functions outside the battlefield itself (scouting, pursuing, scort of supplies) seems to be the most important actions of roman cavalry. The first book of the Caesar's Civil War Commentaries has some nice descriptions of cavalry actions, specially the campaign of Ilerda 49aC, where the caesarian cavalry harassed the enemy constantly along its retreat path.

Xavi Rubio