Field Master
From Halopedia, the Halo wiki
Rank
The Field Master is equivalent to the UNSC Marine "General". Field Masters command entire armies, battalion strength or greater. Unlike human "Generals", Field Masters take a much more active role in combat, as in charging into the battle with their troops rather than giving orders from a HQ miles away from the conflict. They are in charge of all warriors of any race within that army, as well as all armor, air support, and material utilized by that army. An example of this is Noga 'Putumee, who led forces against the humans on Installation 04.
