All models have a troop type given as part of their rules. There are five broad categories of troop type: Infantry, Cavalry, Chariots, Monsters and War Machines, each of which is further divided into sub-categories.
Additionally, some models have the word 'Character' in brackets after their troop type. This denotes that the model is a character, one of the brave and powerful heroes that lead an army.
Troop types and their rules are explained in brief and in greater detail in the Advanced Rules. Characters are explained in greater detail in the Characters section.