| Term 
 | Definition 
 
        |   
  SIR/MA'AM, A O-1 IN THE UNITED STATES MARINE CORPS IS AN: 
 SECOND LIEUTENANT.  HIS INSIGNIA IS A ONE GOLD BAR COLLAR DEVICE.     |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-2 IN THE UNITED STATES MARINE CORPS IS AN: 
 FIRST LIEUTENANT.  HIS INSIGNIA IS A ONE SILVER BAR COLLAR DEVICE. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-3 IN THE UNITED STATES MARINE CORPS IS AN: 
 CAPTAIN.  HIS INSIGNIA IS A TWO SILVER BAR COLLAR DEVICE. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-4 IN THE UNITED STATES MARINE CORPS IS AN: 
 MAJOR.  HIS INSIGNIA IS A ONE GOLD OAK LEAF COLLAR DEVICE. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-5 IN THE UNITED STATES MARINE CORPS IS AN: 
 LIEUTENANT COLONEL.  HIS INSIGNIA IS A ONE SILVER OAK LEAF COLLAR DEVICE. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-6 IN THE UNITED STATES MARINE CORPS IS AN: 
 COLONEL.  HIS INSIGNIA IS A ONE SILVER EAGLE COLLAR DEVICE. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-7 IN THE UNITED STATES MARINE CORPS IS AN: 
 BRIGADIER GENERAL.  HIS INSIGNIA IS A ONE SILVER STAR COLLAR DEVICE. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-8 IN THE UNITED STATES MARINE CORPS IS AN: 
 MAJOR GENERAL.  HIS INSIGNIA IS A TWO SILVER STARS COLLAR DEVICE. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-9 IN THE UNITED STATES MARINE CORPS IS AN: 
 LIEUTENANT GENERAL.  HIS INSIGNIA IS A THREE SILVER STARS COLLAR DEVICE. |  | 
        |  | 
        
        | Term 
 | Definition 
 
        | 
SIR/MA'AM, A O-10 IN THE UNITED STATES MARINE CORPS IS AN: 
 GENERAL.  HIS INSIGNIA IS A FOUR SILVER STARS COLLAR DEVICE. |  | 
        |  |