Sergeant 中士
Sergeant, (normally abbreviated to Sgt) is a rank used in many armies, police forces, and other uniformed organizations. Its origins are in the Latin serviens, "one who serves", through the French term sergent.
The term "sergeant" refers to a Non Commissioned Army Officer placed above the rank of a Corporal and a Police Officer immediately below a Captain.
In most armies the rank of sergeant corresponds to command of a squad (or section). In Commonwealth armies, it is a more senior rank, corresponding roughly to a platoon second-in-command. In the United States Army, sergeant is a more junior rank corresponding to a four-man fireteam leader.