The units in Civilization IV fall into different classes, such as "gunpowder units" or "air units". This category lists those classes.
“A Great Person is a unit representing a uniquely talented individual. Great People (GPs) have...Great Person (Civ4)
“Here is a list of Siege Weapons, also known as Siege Units. Artillery, Cannon, Catapult, Hwacha...Siege Weapon (Civ4)
“Attack Submarine, Battleship, Caravel, Carrack, Carrier, Destroyer, East Indiaman, Frigate...Naval unit (Civ4)
“Barbarians are a special "civilization" that is always at war with all normal civilizations...Barbarian (Civ4)
“Unlike other barbarians, animals can neither move nor attack into any civilization's cultural...Animal (Civ4)
“Late in the game gunpowder units will form the backbone of your army.Here is a list of Gunpowder...Gunpowder unit (Civ4)
“A melee unit is a unit specialized in close combat, as opposed to ranged weapons such as bows...Melee unit (Civ4)
Pages in category "Unit classes (Civ4)"
The following 14 pages are in this category, out of 14 total.