Special Operations Division
Commodore is the lowest Flag Rank. It's insignia is one solid pip enclosed by a square. It ranks above Captain and below Rear Admiral. They may also be referred to as Fleet Captain, however this convention has fallen out of favour. Commodores may be in command of Sectors, Large Starbases, or Task Forces. Outside of Command they also head minor departments within Starfleet and serve in Staff Positons. The Marine Corps equivalent is Brigadier General.