sergeant

A sergeant is a noncommissioned officer in the army and marine corps, ranking above a corporal and below a staff sergeant. Sergeants are often directly responsible for the training and leadership of soldiers. The word "sergeant" has Latin roots meaning "servant".1

There are various ranks of sergeants, indicating different levels of seniority and duties:
* Staff Sergeant: Ranks above sergeant.1
* Sergeant First Class: Ranks above staff sergeant.1
* Master Sergeant: Ranks above sergeant first class.1
* First Sergeant: Serves as the chief assistant to the commander of a military unit.2
* Sergeant Major: The ranking noncommissioned officer in the army, serving as chief administrative assistant in a headquarters.1
* Sergeant Major of the Army: The highest-ranking noncommissioned officer in the army.1

The insignia for a sergeant typically features three upward chevrons, with arcs or curved lines below indicating higher rank.1