In Battlefield 2, as with previous Battlefield titles, players are able to select from a variety of infantry classes. Each class of soldier is equipped with different weaponry appropriate to their role in the battle. Assault soldiers, for example, are general-purpose infantry with grenade-launcher equipped assault-rifles and extra armor, Medics carry first-aid equipment such as a field defibrillator, and Anti-Tank troopers are equipped with missiles which are effective against heavy armor.
Players are able to choose a class at the start of a match, or between dying and respawn once the match has begun or when they have died. Players can also change their class by picking up a "kit" from the body of an incapacitated soldier, friendly or otherwise. Hence, an Assault soldier can become a Medic if they come across a fallen Medic. Player classes are divided in Heavy (with reduced damage done to the torso, but lower stamina) and Light (with standard multipliers, but higher stamina, thus able to sprint for a longer time).
Within the infantry class, there are three support classes with special abilities. The Engineer can repair with his wrench, the Medic can revive with his defibrillator paddles and heal, the Support can resupply ammunition with his ammunition bags. When one of the these three classes occupies a vehicle, nearby personnel and vehicles can be replenished, repaired or healed by being in close proximity.