The Sangheili Councilor is the highest attainable rank, however the Arbiter is more religiously significant.
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The highest rank in Halo: Reach is Inheritor.
Master Chief is a Master Chief in the UNSC (A fictional branch of the military) and is the highest enlisted rank attainable.
We can not answer. You must have had to pr order halo reach to get elite officer armor.
The highest rank you can reach is 46.
you need to be the rank of captain