A sergeant is a non-commissioned officer in the military or police force, typically responsible for leading and training lower-ranking personnel. They play a crucial role in maintaining discipline, ensuring that orders are followed, and assisting in the management of their unit. Sergeants often have specialized skills and experience, making them valuable leaders within their teams. In the military, sergeants can be found in various branches, such as the Army, Navy, or Air Force. In law enforcement, they may oversee patrol officers and coordinate responses to incidents. Their leadership helps ensure effective operations and the safety of their team members.