Battlelog:Platoons
In battlelog, you can create platoons (clans) and have Platoon Commanders and Platoon Sergeants, who act as clan leaders and their second in commands respectively. An example of a platoon is 3rd Platoon Firestorm, a Xbox 360 clan lead by USMC C0MMAND3R. It is unknown whether or not there is a limit to the amount of people in a platoon.