Army rank pins are a symbol of a soldier's rank and position within the military. They are worn on the uniform to indicate the soldier's level of authority and responsibility. The design and placement of these rank pins vary depending on the branch of service and the specific rank. Here is an overview of the various army rank pins: Enlisted Ranks Enlisted ranks are entry-level positions in the military. These soldiers have not yet completed officer training and hold non-commissioned officer (NCO) positions.