The abbreviation O7 corresponds to which rank?

• A. Brigadier General
• B. Major General
• C. General
• D. Colonel

Answer: (A)

O-7 marks the first level of general-officer ranks, which is a one-star rank. In the Army, Air Force, and Marine Corps that one-star rank is Brigadier General. A Colonel is at O-6, which is a senior field-grade officer but not a general officer. Major General is O-8 (two stars), and General is O-10 (four stars). In Navy/Coast Guard the equivalent one-star rank is Rear Admiral Lower Half, but the one-star level corresponds to Brigadier General in the other services. So the O-7 designation best maps to Brigadier General.