At its most basic, units in Rise of Nations are divided in three basic categories, regarded by this wiki as classes: Civilians, which maintain the economy, Military Units, which defend the nation, and Support Units, which serve as tactical and strategic aides to military efforts. Military units, in their great variety, are themselves divided in several sub-classes. Each class and sub-class is further divided by the different qualities of the units in them, what this wiki calls unit types. In addition, some unit classes are also a unit type at the same time; for instance, Artillery Weapons are a unit class with only one line of units, so it manages to be both a unit class and unit type.
This category has the following 3 subcategories, out of 3 total.