Canon

CAA Marshals

From Halopedia, the Halo wiki

The CAA Marshals are a law enforcement agency under the Colonial Administration Authority. Marshals hold jurisdiction on all Unified Earth Government-controlled colonies except for Earth, in which they serve as frontier sheriffs - particularly prevalent in the Outer Colonies. Depending on the size of a given colony, a single Marshal may have responsibility for enforcing UEG law across an entire world or even (in rare cases) a whole solar system.[1]

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