Starfleet Chain of Command
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This shows the Starfleet command stucture, and the number of collar pips a person of the specified rank wears.
Commander in Chief - 
Vice Commander in Chief - 
Fleet Admiral - 
Admiral - 
Vice Admiral - 
Rear Admiral - 
Commodore - 
Captain - 
Commander - 
Lieutenant Commander - 
Lieutenant - 
Ensign - 
Cadet - 