There are different types of troops to choose from.

Different types of soldiers have different equipment and are suited to different tasks. Only when each type of soldier plays its role properly can the team gain an advantage in the confrontation. Troop types can be broadly divided into assault troopers which are the main attackers support troopers which provide ammunition medical and repair services for coordinated combat and scouts which provide information on the front line and behind enemy lines. Some games have a finer division of some of the categories with the most being the seven soldier types that appear in Battlefield 2.
Since Battlefield 2 the game has introduced a squad system. Squad leaders can give orders to their team members while squads can respawn around the squad leader. In addition squads can talk to each other internally by voice so squads can form a flexible powerful combat unit for missions. Players can also choose not to join any squads and fight "lone wolf" but this is generally less efficient.