What is the lowest rank in JROTC/Marine Corps?

The lowest rank in JROTC and the Marine Corps is E-1, which is referred to as Private. This rank serves as the initial point in the enlistment hierarchy, distinguishing individuals who have just begun their military careers. Private signifies entry into the Marine Corps and represents a foundational level where individuals start their training and education in military customs, courtesies, and responsibilities.

Higher ranks, such as Private First Class (E-2), Corporal (E-3), and Sergeant (E-4), indicate progression in both experience and responsibilities, each requiring certain achievements and time in service. Therefore, E-1/Private is specifically designated as the starting rank, marking the entry into the Marine Corps’ rank structure.