The player may choose one of four roles in battle: infantry, air, support or armor. Each role has its own exclusive units, which aren't available for purchase from other roles. The basic units of the roles can be purchased by everyone but are more expensive for players with a different role.
Infantry[edit]
Players have access to various infantry squads such as anti-tank teams and snipers, along with light transport vehicles. Infantry are generally vulnerable when not concealed or garrisoned in structures, but are effective against all unit types under the right conditions.
Armor[edit]
Allows players to use various classes of tanks, the dominant direct fire land combat unit of the game.
Air[edit]
By far the most mobile and powerful class of unit in the game, players using the 'air' specialization have access to anti-armor and air superiority helicopters, as well as scout and transport units. Air units are very vulnerable, naturally, to fixed, vehicular, and man portable anti air systems, however, giving the role a high risk high reward play style.
Support[edit]
A general purpose support class, Support contains anti-air, artillery, and repair units and is the most versatile class in the game.