Platoon guide
A platoon guide is a position, but not a rank in the United States Army and Marine Corps.
In an infantry platoon the platoon guide is a non commissioned officer who acts as an assistant platoon sergeant. The platoon guide is responsible for ensuring the platoon is supplied with ammunition and rations.[1]
In a basic training unit, the platoon guide is the senior recruit in the platoon chosen by his or her Drill Instructor as a liaision between the Drill Instructor and the platoon and the recruit leadership of the platoon.[2]. The platoon guide also carries the platoon guidon.