Pikenier (Civ4 FFH)
This unit is strongest against Mounted units.
A wall of pikes is a horseman's nightmare. Like a glistening metal hedgehog, squares of pikemen present an insurmountable obstacle against cavalry, and can hold their own against other units as well. The pikemen are professional soldiers in the true meaning of the word, often mercenaries, hired and paid for by rich guilds to protect their cities. They are perfectly trained and have incredible morale. After all, a lone or fleeing pikemen does not last long on a battlefield.