E-5 is a military rank used in various armed forces, including the United States Army and United States Air Force. It typically denotes a non-commissioned officer (NCO) position, where individuals have increased responsibilities and leadership roles compared to lower ranks. In the Army, an E-5 is known as a Sergeant, while in the Air Force, it is referred to as a Staff Sergeant. Achieving the E-5 rank usually requires a combination of time in service, demonstrated performance, and completion of specific training courses. E-5 personnel often supervise junior enlisted members and play a crucial role in maintaining unit morale and discipline.