Sigma Team

Sigma Team, also known as Sigma-Alpha, was a group of SPARTAN-II commandos recruited under the top-secret Project SIGMA. After completing their training, Sigma would operate in secrecy for decades under the joint control of ONI and the UNSC as both frontline combatants and a covert operations unit during the Human-Covenant War. The team fought on many worlds between 2525 and 2552 and played a vital role in many UNSC victories while lessening the cost of any defeats wherever they served. 
The team remained unbreakable throughout most of the war, and despite being from a program made secret even from Halsey's Reach-trained Spartans ended up playing a major role in a number of battles. Sigma remained active following the end of the war after taking a number of casualties, and would serve under the UNSC Navy's command instead of joining . In the post-war years Sigma would continue to distinguish itself in the field, and became a leading force against the Created's attempt at galactic domination in 2558.
==Biography==
===Conscription & Training===
In 2517 the future SPARTAN-II's were selected following a vaccination program across the colonies, with 150 potential candidates identified by the Office of Naval Intelligence. However, only half could be chosen due to budgetary reasons, and after being kidnapped they were taken to Reach for training. Despite this, ONI still continued to monitor on the remaining seventy-five and the allocation of additional funding from Captain Frederick King allowed for twenty other children to be abducted and trained on Earth in secret. This was Project SIGMA. The children were rigorously indoctrinated and educated under the command of ONI's Doctor Calvin Roe and were taught the art of combat, military strategy, and survival by various drill instructors and Lieutenant Colonel Richard Mack, a famed special forces hero.
Over the course of eight years, these children would be moulded into humanity's finest soldiers much like their Reach-trained counterparts, forming bonds of camaraderie as they surpassed all expectations. Unlike those brought up as part of Catherine Halsey's program, the trainees within SIGMA were destined to serve under the direct command of the Office of Naval Intelligence to perform tasks no other soldiers or agents could accomplish, leaving the other SPARTAN-II's to undertake the monumental task of crushing human insurrection. During their training the candidates were split into three groups - Sigma-Alpha, Sigma-Beta, and Sigma-Gamma. Sigma-Alpha would be the largest of the three, consisting of eleven Spartans.
In 2525, the fourteen year-old SIGMA candidates would go through a series of biological augmentation procedures several months after the larger group on Reach had theirs. Armed with knowledge taken from the Reach Spartan program, who had only successfully augmented roughly half of their candidates, SIGMA made a number of necessary corrections and were able to augment their Spartan trainees with a significantly higher success rate. Immediately afterwards, Sigma-Alpha was split off from the others and told that they and been the only survivors by Doctor Roe to keep Sigma-Beta - the group chosen as ONI's personal eliminators - completely off the records. Several weeks later two of the Spartans, Jack-085 and Ahmad-126, escaped their training facility and went on the run. Ahmad was found dead by his pursuers shortly afterwards in what may have been a suicide, while Jack successfully fled the planet and vanished.
===Battling Insurrection===
In January 2526, the nine remaining members of Sigma-Alpha were outfitted with suits of armour, freshly-manufactured based on data recovered from the Damascus Testing Facility on Chi Ceti IV. Now known simply as 'Sigma Team', the nine Spartans were deployed on their first mission shortly after to the colony world of Gallis, which had been embroiled in a vicious civil war that due to a lack of UNSC forces had gone in the favour of the United Rebel Front, a sizeable Insurrectionist faction. With the rebels having supposedly seized several nuclear devices that they threatened to detonate, Sigma acted quickly, infiltrating the capital through its sewer system before launching a surprise attack on the rebels there.
Sigma Team performed as expected, swiftly and brutally wiping out the rebel forces holding the capital before they could mount a proper response. During their raid they discovered that the rebels had been bluffing about setting off a nuclear device, and swiftly eliminated most of their leadership. However, they failed to find the mastermind behind the attack, who left the Spartans a message implying that he knew about the Spartan program before an explosive trap almost killed Marco-035. Despite this minor issue Sigma Team's first proper mission was deemed a resounding success, with combat reports roughly equalling that of their Reach-trained counterparts. Following this they were officially 'graduated' from the SIGMA program and transferred to for all future missions.
===Human-Covenant War===
While Sigma Team busied itself with fighting the Insurrection for the next few years, taking down rebel holdouts and eliminating key leaders in the shrinking insurrectionist network, the decision was made to move the unit away from its original purpose of fighting rebel forces and dedicate itself solely to participate in the worsening war against a collection of alien species known as the . The Spartans had been kept away from the frontlines, held in reserve until the true extent of the situation in the Outer Colonies became clear to HIGHCOM. Sigma saw its first proper mission against the Covenant in December of 2530, participating in a skirmish on Brennus where they first identified an in battle.
Sigma Team served in many different operations during the Human-Covenant War, and was always able to accomplish the mission no matter what. They fought on many world, many battlefields and always got out alive, never leaving a teammate behind. However, in 2550, that all changed in a massive engagement against Insurrectionists, that brought the team it's first two casualties, and a brush with a former member. Two years later, in early 2552, Sigma Team was stationed on the colony world of Harpa when it was attacked by Covenant forces. Sigma Team took two more casualties there, also losing Mack Sr. With a badly damaged ship, they were barely able to escape to Reach. Several months later, during an evacuation of a colony world, another member of the team, Resk-063, gave his life trying to save thousands of civilians from Covenant forces. This would be the third SPARTAN lost in a single year.
===The Fall of Reach===
Sigma arrived on Reach mere days before the main attack. As they were heading to an outpost via Falcon, they received a distress call from Tau Team, who had been attacked while investigating one of many communication arrays that went down across the planet. The team were surprised to find a Covenant attack force there, and managed to wipe out their foes, returning to command just as WINTER CONTINGENCY was declared by HIGHCOM following an attack on the Visegrad relay. Not long after, Spartan teams Sigma, Upsilon, Tau and were deployed in a large against Covenant landing forces in the area. Though successful on the ground, the UNSC were put into full retreat following the reveal of a cloaked Supercarrier above the battlefield. Following , Sigma, accompanied by Tau Team, were sent on a mission, Codenamed Operation: DROPKICK. This was a follow-up to UPPERCUT. The team were to board and destroy a Covenant Supercarrier about to go into Reach's atmosphere. The Mission was successful, but at the cost of Frank-A103 and Dom-A178.
Not long after, they were deployed to New Alexandria to Evacuate a VIP, Dr. Calvin Roe, the man who had them kidnapped and trained. However, as the three teams got to the building the Doctor was in, they came under heavy attack by Covenant forces. Wulf-041, Dan-A105, Eugene-
A133 and Chris-A189 entered the building to clear out covenant forces and extract the VIP, while the others provided covering fire from Falcons. However, Dr. Roe only needed the Spartans' assistance to provide cover for his escape, and detonated the building, supposedly killing Wulf and the others. As Roe sped away, Kane-098 ordered the Spartans to pursue him out of New Alexandria.
Leaving the city mere hours before it's final glassing, They pursued Roe to Outpost Foxtrot Whiskey. As they approached, several banshees began pursuing them. Dr. Roe, knowing that the Spartans were chasing him, landed, and killed his ODST bodyguard, taking his armour.
He then ordered the several Rocket Warthogs stationed on a cliff side to fire upon the approaching Falcons, saying that they had been seized by the enemy. The warthogs unleashed a salvo that destroyed the lead Falcon, killing Sal-A142. The surviving falcons, still pursued by banshees, flew past, causing the warthogs to be destroyed by banshee fire. Upon landing at the base, The Spartans began looking for Doctor Roe, who attempted to board a warthog, but was stopped by Alex-A121. Roe attempted to run, but was quickly surrounded. Despite trying to reason with the Spartans, Roe was killed by Marco-035, who believed him responsible for the deaths of Wulf, Dan, Eugene and Chris.
Several hours later, more UNSC forces arrived at the base from New Alexandria. The last group warned the Spartans that Covenant forces were on the way. Rallying the troops, Kane-098 devised a plan: He and Martin-A136 would stay at base along with snipers to provide cover. Jax-007 would lead a tank-led charge along the right flank, while Marco-035 led infantry up the left. If things were going badly, they would use their Falcons to escape the base. Eventually, a large enemy force arrived not far away from the outpost. Wraiths bombed the area, and squads of elites began charging in. With heavy losses, the Spartans held their own until several enemy Ghosts and Revenants arrived. By this time, Kane-098 had joined the fight up front. He was almost killed by a Revenant had it not been for Dorian-A188, with a Dropshield. As they began to push towards the hill, Dorian was killed by a Plasma launcher. Marco-035 also used Armour Lock to save himself. Eventually pushing through a cave, the Spartans were able to wipe out the last covenant forces on a small island, winning the battle.
Back at the base, Martin-A136, whose wounds had been temporarily healed with Biofoam, intercepted communications from the , about their preparations to leave the plane, and that any remaining UNSC forces should join them soon. when the others arrived, Martin told them the news, and they flew towards the shipyard. When they arrived, however, the Pillar Of Autumn had only just left, leaving behind a large amount of Covenant, most of whom began to head towards Sigma's location.After checking a terminal Kane-098 saw that there was a single Frigate left nearby: The UNSC Bright New Day.
To slow the Covenant down, Jax-007, Nelson-A122, Jordan-A111 and Alex-A121 volunteered to stay behind and hold them off until the frigate was in the air. Kane-098, Marco-035, Martin-A136 and Louie-A199 travelled to the frigate, where they met up with the survivors of Whiskey-04. In the ensuing battle, both Jordan and Nelson are killed. Jax and Alex managed to commandeer two banshees and fly into the frigate's vehicle bay. Though it was a close escape Bright New Day managed to slip by the Covenant's blockade of Reach and made a blind jump into slipspace, leaving the doomed colony behind.
===Return to Earth===
Unwilling to risk being tracked back to Earth by the Covenant, Kane had the Bright New Day make several random jumps through slipspace and attempted to regroup with any other surviving UNSC forces. Sigma soon became involved in the Loss of Hope, though their contribution to the battle was minimal as they were forced to prioritise finding a replacement slipspace drive for their frigate over assisting UNSC forces as the battle came to a close. While they came close to escaping the system, Hope's sudden implosion and the sudden appearance of a Forerunner Dyson sphere drew the Spartans into another fight. It was here that Sigma reunited with Elena-071, whom they had thought dead for decades. Elena took operational control of Sigma for their mission into the sphere, which resulted in a brief but brutal encounter with encroaching Covenant troops as they extracted a Forerunner artefact and retreated, going their separate ways with Elena with the promise to reunite back on Earth.
Shortly after their engagements on Hope and the Zenith Complex, Sigma unexpectedly ran into a rag-tag group of UNSC vessels stationed at a Navy rendezvous point, led by one Captain Jeanette Nisha. Though Kane placed the group under the ONI officer's command, expecting her to lead their force back to Earth, Nisha instead enlisted the Spartans for a dangerous assault on Second Sanctum, a fortified moon deep in Covenant-held space. Though the Spartans had their misgivings about the operation, Sigma followed Nisha's orders and used a captured to infiltrate the enemy fortress, where they discovered a number of human prisoners. What ensued was a brief but costly battle as Nisha's battlegroup arrived, laying waste to their foe for a brief time before a larger Covenant fleet joined the battle. Sigma Team barely escaped Second Sanctum with their lives, having saved a number of civilians from the Covenant's clutches before the entire fortress was obliterated by a nuclear strike. As Nisha and most ranking officers had been killed in the battle, Sigma transferred the prisoners to the only other surviving UNSC vessel - a destroyer - and set off along in the Bright New Day, limping back to Earth over the course of several weeks. 
Arriving in the Sol System in early November, Sigma found Earth besieged by the Covenant. With the Day badly damaged after weeks of battle and infrequent maintenance, Kane ordered the crew to abandon ship as they approached Earth. While most of the crew fled in lifeboats and shuttlecraft, Sigma and the remnants of Whiskey-04 made the journey down to the planet in SOEIV's, and landed close to the city of Moscow in Russia, sacrificing their frigate in a suicide attack against an enemy cruiser. After regrouping with their ODST allies, Sigma fought a bloody battle across the city for the better part of a day, staunching the Covenant's invasion long enough for allied forces to destroy an enemy warship with a HAVOK nuke. From there, Sigma were transferred to ONI's PILLAR base, where they received suits of newly-constructed MJOLNIR Mark VI armour before splitting up to help defend key locations across Earth's surface. Sigma's final role in the Human-Covenant War would be a series of operations in Africa, where they launched numerous hit-and-run attacks against enemy encampments to divert the Covenant's attention away from a strike force heading for a the invaders had unearthed in Kenya. Sigma would remain on Earth to help mop up any Covenant resistance for several months, until news of the war's end finally reached them.
===Post-War===
Following the end of the Human-Covenant War, Sigma Team was divided once more. Martin and Louie were reassigned to solo operations by ONI against pockets of Covenant resistance in the rebuilding Outer Colonies, while Alex was placed in charge of a Remote Contact Team for some time. While the had been created to accommodate the SPARTAN-IV Program, Sigma Team remained under the UNSC Navy's jurisdiction and continued the fight against Covenant and Insurrectionist targets for the next few years.
Despite their losses in the war's final years, the three Spartans showed no signs of slowing down and welcomed the opportunity to return to duty after their brief reprieve at the end of the war. They would continue to serve with distinction as new threats emerged in the post-war galaxy. They would go on to fight not only against the large Covenant faction serving under , but also terrorist groups such as the and True Vanguard. Following the discovery of Requiem in 2557, Sigma sound found themselves deployed to numerous freshly-discovered Forerunner sites as constructs began to appear alongside Covenant foes.
The following year, Sigma would eventually be rejoined by Wulf-041, who had survived a near-death experience on Reach and served under a rogue ONI faction known as Red Cell for several years before Sigma helped shut down their insurgency. While his loyalty towards the UNSC was questioned, the rest of Sigma soon welcomed their old comrade back into the fold. By October of 2558, Sigma Team were stationed in the Sol system, working primarily out of Denegroth Station, a Spartan training facility on 
===Created Conflict===
When the launched their galaxy-wide campaign of subjugation against the galaxy on October 28th, Sigma Team were scattered. Marco and Wulf were aboard the UNSC Peacemaker over Europa, Jax was leading a training exercise on the moon's surface and Kane was visiting on leave. Taken off-guard by the sudden arrival of the Created and their seemingly-unstoppable Guardian constructs, the four Spartans were forced into their own battles as the Peacemaker immediately fled the Sol system. 
Following the near-total destruction of Denegroth Station, Jax and a group of SPARTAN-III survivors began to wage their own guerrilla campaign on Europa over the next few days, successfully fighting their way off the moon with enemy forces in hot pursuit. Hijacking a civilian vessel, Jax's team then launched an attack on the Created-occupied Helios Station over Mars, outwitting and almost destroying a hostile Created AI in the process before making their own escape outsystem in a stolen prowler.
==Team Rosters==
===Original Team (2525-August 2552)===
The initial group formed shortly before Sigma's first combat mission in 2525, this nine-man group would operate undisturbed for over twenty-five years without a single loss. Commanded by Fenn-145 for much of the war, this iteration of Sigma was a devastating force on the battlefield and often operated in smaller groups for maximum efficiency. Seeing some of the bloodiest years of the Human-Covenant War, Sigma fought on the frontlines on many occasions until the loss of two of its members in 2550, after which it was withdrawn for more defensive operations.
With three deaths in the first half of 2552, including its leader, Sigma was reformed yet again into a smaller strike team by the time of the Fall of Reach. This battle would see another Spartan go missing in action as Sigma cooperated with several of its SPARTAN-III 'successor' teams, though the heavy number of casualties in August prompted Kane-099 to fold several new members into the group after their escape from Reach.
Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members
Call Sign 	Image 	Name 	Rank 	Status 	 	 	 	
Sigma One 	 	Fenn-145 	 	KIA 	 	 	 	
Sigma Two 	 	Kane-098 	 	Active 	 	 	 	
Sigma Three 	 	Jacob-076 	 	KIA 	 	 	 	
Sigma Four 	 	Jax-007 	 	Active 	 	 	 	
Sigma Five 	 	Resk-063 	 	KIA 	 	 	 	
Sigma Six 	 	Wulf-041 	 	MIA 	 	 	 	
Sigma Seven 	 	Nef-015 	 	KIA 	 	 	 	
Sigma Eight 	 	Amy-133 	 	KIA 	 	 	 	
Sigma Nine 	 	Marco-035 	 	Active 	 	 	 	
===Second Team (August 2552 - May 2558)===
Formed from the surviving members of teams Sigma, Upsilon and Tau, the second iteration of Sigma-Alpha would operate independently for some time after the Fall of Reach, participating in several battles without an officer to command them as they made their way back towards the Sol System. Its six members would arrive in time for the Battle of Earth and survived until the end of the war without any further casualties. 
Shortly after the war's end, Sigma's SPARTAN-III members would be reassigned to separate positions, leaving the group with only three operators. Lacking the numbers for frontline combat, it Sigma would now specialise in covert operations and remained as an effective group under ONI's direction for nearly six years, until the Red Cell Insurgency saw the return of a missing Spartan. 
Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members
Call Sign 	Image 	Name 	Rank 	Status 	 	 	 	
Sigma One 	 	Kane-098 	 	Active 	 	 	 	
Sigma Two 	 	Jax-007 	 	Active 	 	 	 	
Sigma Three 	 	Marco-035 	 	Active 	 	 	 	
Sigma Four 	 	Alex-A121 	 	Reassigned 	 	 	 	
Sigma Five 	 	Louie-A199 	 	Reassigned 	 	 	 	
Sigma Six 	 	Martin-A136 	 	Reassigned 	 	 	 	
===Third Team (May 2558 onwards)===
Sigma Team's third iteration would be formed after the return of Wulf-041 in late May of 2558. Now up to four members, it would spend several months working to track down Insurrectionist groups in the Outer Colonies before returning to the Sol System just prior to the outbreak of the Created Conflict in October.
Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members	Sigma Team Members
Call Sign 	Image 	Name 	Rank 	Status 	 	 	 	
Sigma One 	 	Kane-098 	 	Active 	 	 	 	
Sigma Two 	 	Jax-007 	 	Active 	 	 	 	
Sigma Three 	 	Marco-035 	 	Active 	 	 	 	
Sigma Four 	 	Wulf-041 	 	Active