A Platoon is the third-smallest unit in an army, with squads being second and fireteams being first. A platoon is consisted of 26 to 55 soldiers, in which three, four or five platoons make up a company. A platoon is led by a commissioned officer known as the platoon leader or commander, which is usually a lieutenant, who is assisted by a non-commissioned officer known as the platoon sergeant.
Introduced in the Battlelog, platoons were added to allow players to stay in better contact with one another and to be able to coordinate themselves better. Each platoon has two main ranks other than regular players - the Founder, who created the platoon, and the Leader, who may or may not be the Founder, and is responsible for the administration of the platoon. Platoons are limited to 100 members, and are also limited to the platform that the Founder plays on, although anyone can become a fan of a platoon. The Platoon's emblem can also be changed using an editor within Battlelog by the Founder or Leaders, allowing them to distinguish their platoon from others.
Platoons were removed in the Battlefield 4 version of Battlelog. Information from Platoons created in the Battlefield 3 version will still be displayed in the activity feed. Platoons may be added at a later date.