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A Division is the smallest tactical unit used in Star Fleet, usually comprising of between two and four ships depending on size. For example, a Frigate or Destroyer division would likely contain four vessels, while a Heavy Cruiser division would contain only two. Divisions are almost always grouped together to form Flotillas or Squadrons, though some operate independently. A Division is commanded by the senior Commanding Officer, regardless of rank. ===Flotilla=== A Flotilla is a group of between two and three Divisions of smaller vessels such as Frigates or Destroyers for a specific purpose, such as patrol or convoy defence. Unlike Battle Groups, Flotillas are permanent organisations, and a vessel may be assigned one from the day it is commissioned to the day it is decommissioned or destroyed. A Flotilla is usually commanded by a senior Captain, often generally seen as a lead-in to Squadron Command and eventual flag rank.

Squadrons are a small group of generally between two and four Divisions. A Cruiser Squadron would usually be made from two Cruiser Divisions, while a Destroyer Squadron would be composed of three or four Destroyer or Frigate Divisions. Squadrons are permanent administrative organisations, though are usually only deployed together during times of crisis. A Squadron is usually commanded by a Commodore or senior Captaindepending on size.