They are knightsobviously. but 1 moniez is still awesome for rome.
main problem i have with it is the poor balancing, due to the focus on heavily armored, shield carrying troops and the lack of armor piercing missile units. also, a full army of heavy cavalry can break the moral of an entire army literally the second it charges into them, since the moral shock gets exponentially bigger the more troops are killed and the less time passes. so the charges killing about 10% or so of each unit in one second or less makes them all go from confident to shattered instantly^^
or at least it was that way when i played it almost 10 years ago, maybe they actually fixed these balancing issues in later patches.
They're meant to do that