The Squad, normally 8-16 soldiers, is the lowest element in the Army organizational structure. The leader is a non-commissioned officer, usually a Sergeant (E-5) or Staff Sergeant (E-6). In some units two Squads may compose a Section led by a Staff Sergeant (E-6).

Sergeant SGT E-5
Staff Sergeant SSG E-6

In a Light Infantry (non-mechanized) Squad, there are normally nine (9) soldiers and a Squad Leader. In a Mechanized Infantry Squad, there are up to 16 soldiers, organized into two Teams. Each Team is assigned to a tactical vehicle (e.g., Bradley Fighting Vehicle).