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|Political and military information|
Battle of Installation 05
- Main article: Battle of Installation 05
McKenzie was present when the UNSC In Amber Clad took part in the Battle of the Quarantine Zone. They accompanied with Corporal Perez, Sergeant Major Johnson, and Commander Miranda Keyes to the Library to retrieve the Activation Index. After securing the Library facility, Johnson left Perez and McKenzie to guard the exit while he escorted Keyes to retrieve the Index. It is unknown what exactly happened to Perez and McKenzie during this endeavor. They may have been killed by the Flood, killed by the Arbiter, or captured/killed by the Brutes, as when Johnson calls them for their status, they do not respond. The Arbiter arrived shortly after, capturing Keyes, Johnson, and the Index.