From Halopedia, the Halo wiki
In 2558, the UNSC Infinity returned to the shield world Requiem. During the attack on the ship, Fireteam Kodiak and Fireteam Avalanche were ordered to defend Fore Armory 12-7. Later they were reinforced by Fireteam Lancer. Sometime later, the three fireteams were able to secure the armory and sent to different stations.
Kodiak was later sent in with Fireteam Crimson to take out Covenant artillery at "Cyclone" that was firing on Fireteam Majestic though their Pelican was shot down by the artillery while landing. The two teams proceeded to destroy the three pieces of Covenant artillery. After destroying the artillery, they fell back to the LZ and defended against Covenant reinforcements before eventually being extracted by a Pelican flown by Lieutenant TJ Murphy.
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