717th Xeno-Materials Exploitation Battalion

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717th Xeno-Materials Exploitation Battalion


United Nations Space Command


UNSC Marine Corps


Securing and retrieving alien materials under hostile conditions.


Approx. 900 Marines[1]


CDR Murtag Nelson, ONI

Battalion AI:



The 717th Xeno-Materials Exploitation Battalion was a formation of the United Nations Space Command Marine Corps under the operational command of the Office of Naval Intelligence's Xeno-Materials Exploitation Group.[2] It was tasked with securing and retrieving alien materials, including Forerunner artifacts.


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After the detection of Forerunner activity on the planet Gao on April 14, 2553, CINCONI Margaret Parangosky gave command of battalion to Commander Murtag Nelson and deployed it to the planet in order to secure a hypothesized Forerunner ancilla.[3] The battalion's deployment, however, angered many of Gao's anti-centralist citizens. During the course of the expedition, numerous people were found murdered in Gao's Montero Cave System, which launched a joint UNSC-Gao Ministry of Protection investigation into the murders. The UNSC believed that the murders were committed by radicals wishing to blame them on the UNSC occupation, while many of the Gaos were convinced the UNSC to be responsible.[4]


The battalion was composed of three combat companies, two-three support companies and one security company, in addition to several scientific units that allowed it to pursue its unique mission.[1]

Identified units

List of appearances[edit]


  1. ^ a b Halo: Last Light, Page 33
  2. ^ Halo: Last Light, page 52 (Google Play edition)
  3. ^ Halo: Last Light, page 23
  4. ^ Halo: Last Light, page 30
  5. ^ Halo: Last Light, page 284 (Google Play edition)
  6. ^ Halo: Last Light, page 150 (Google Play edition)
  7. ^ Halo: Last Light, page 333 (Google Play edition)