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Fireteam Crimson is a combat team of SPARTAN-IV supersoldiers of the UNSC. Crimson, consisting of four members, were present aboard the UNSC Infinity in February 2558 and fought on the Forerunner planet Requiem.
Second Battle of RequiemEdit
They were then deployed in tandem with Fireteam Majestic to clear out Forerunner structures. Crimson cleared their structure first, much to the annoyance of Majestic. As the battle of Requiem raged on, fireteam Crimson managed to assassinate Parg Vol, a Sangheili terrorist. Later, in pursuit of Jul 'Mdama they managed to secure a Forerunner device known to the Covenant as The Didact's Gift. They were later captured by the Covenant on a search and rescue op for Gabriel Thorne but escaped, and began a series of crippling surprise attacks on the Covenant using a Phantom flown by Lieutenant TJ Murphy before being recalled to Infinity, which was under attack. After crashing in the hangar, they disarmed several stolen HAVOK Tactical Nuclear Weapons, turned the rear outer defenses back online, and thus secured the Infinity.
They later were tasked by Infinity to assist with the deactivation of one of the two Artifacts that was holding Infinity in Requiem's gravity field. After succeeding, they raced to Infinity in a Pelican while Requiem was pulled into its own sun. After 'landing' on the massive ship, Requiem was destroyed, while Infinity jumped into slipspace.
- A mundane hint can be discerned from comments made by Commander Palmer and SPARTAN Miller during Episode One, Chapter Three of Spartan Ops, which indicate that Crimson had never encountered Prometheans before. This would imply that like Fireteam Majestic, Crimson was deployed to the UNSC Infinity after the First Battle of Requiem.