Metarchian Military Organisational Structure

Army Group
Core
Division
Brigade
Regiment
Battalion
Company
Platoon
Section
Squad
Fire Team

The Marines and Special Forces are organised similarly, without the Army Group and Core respectively.

Royal Metarchian Air Force

Command
Division
Wing
Group
Squadron
Flight
Section
Element
Detail

Royal Metarchian Navy

Task Armada
Task Fleet
Task Force
Task Flotilla
Task Pack
Task Group
Task Element
Task Unit

The Tasking is a variable Title normally allocated depending on the allocated role, or the highest ranking ship in the tasking.
examples of role or mission tasking are Rescue, Hunter, Patrol, when there is a capitol ship in the tasking it is normally named after the ship. for example the carrier Pegasus in a Fleet would be a carrier fleet, specifically the Pegasus fleet.