Catherine Halsey, the MJOLNIR armor represented her vision of creating a slim powered exoskeleton capable of taking full advantage of the physical capabilities of a SPARTAN-II. Developed parallel to the SPARTAN-II program by the Office of Naval Intelligence's Materials Group, the MJOLNIR powered assault armor was a radical redesign from previous large, bulky exoskeletons, streamlining their design into a compact suit of armor practical for use in the field.
