Does Civ IV have anything like the Army units of Civ III?

I've been playing Civ IV a couple of weeks now and have not seen any,
but I don't know if that is just the scenario I have been playing, or
the game as a whole.

I liked the Army units in Civ III, and tried unsuccessfully to mod a
new Fleet unit - like the Army, but containing sea units instead of
land units. I was hoping Civ IV might have them?

Thanks,

BP