A Task Force is the primary organizational unit used within the various numbered fleets of Starfleet. All starships and starbases are assigned to a Task Force, and each Task Force is lead by a Task Force Commanding Officer, who hold a rank typically of Commodore or higher and usually command up to two dozen starships and starbases of various classes. A Task Force Commanding Officer is considered senior to all personnel within their Task Force, and can often issue orders directly to the captains under their organization.
Task Forces are often split into Task Groups led by a Task Group Commanding Officer, in order to delegate the authority and responsibility out, rather than placing the full responsibility solely on the Task Force Commander's shoulders. A Task Force can include additional staff officers at the Task Force Commander's discretion, with approval from the Admiralty.