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)
“Barbarians are a special "civilization" that is always at war with all normal civilizations...Barbarian (Civ4)
“Attack Submarine, Battleship, Caravel, Carrack, Carrier, Destroyer, East Indiaman, Frigate...Naval unit (Civ4)
“Here is a list of Mounted Units in Civ4: Ballista Elephant, Camel Archer, Cataphract, Cavalry...List of mounted units in 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.