Commissioned officers in pay grades O-4 to O-6 are called ______________ officers.

Commissioned officers in pay grades O-4 to O-6 are referred to as field grade officers. This classification is based on their rank within the military structure, where O-4 corresponds to Major, O-5 to Lieutenant Colonel, and O-6 to Colonel. Field grade officers typically hold significant leadership roles and have greater responsibilities compared to lower-ranking officers, such as company grade officers, who are in pay grades O-1 to O-3.

Understanding the distinction between different ranks is crucial for grasping the hierarchy and command structure within the military. Field grade officers often serve as key decision-makers and are involved in higher-level operations and planning. Their roles may include commanding units and overseeing various functional areas, making their designation distinct from those of lower grades.