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Under the operational control of Naval Special Warfare Group One, the project is created to combat the growing Insurrection throughout the human Outer Colonies. Multiple companies of Orion Prototypes are created.
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Captain Wesker, formerly the leader of the ORION 1st Company "Alpha", is transferred to ONI Section 3, and becomes part of the contingent of agents who kidnap the Spartan-II Candidates.
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The Spartan-IIs are kidnapped following Halseys order to Deja. They awaken and begin training on the 24th. -
The events of Halo: First Contact ensue.
The Covenant formally engage humanity in combat for the first time on February 11th. -
The Great War. Humanity battles the Covenant in a battle to exist, with an insane amount of casualties and the near extinction of the human race. The Great Schism and the Master Chief's presence are the only real reason humanity survives.
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the Spartan-IIs undergo rigorous chemical, physical and biological augmentations onboard Medical Facility Endurance in orbit over the planet Reach.
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Spartan-II Washouts occur during augmentation, and the Washouts are cryogenically preserved in the hopes of being revived in the future. Silver Team is part of these Washouts, as is Red and Black Teams. -
Cain-107 is captured during a Headhunter mission on Harvest, the Silent Shadow that were deployed were targetting Admiral Cole during his victory over Harvest. Cain severs his own arm to escape captivity, and brutalizes a vast majority of the ships crew. He hijacks a Lich present on the vessel, and escapes back to friendly space. His arm and a nav beacon are left on it, which results in the UNSC discovering High Charity. Randall-037 temporarily replaces him in Silver Team as he recovers. -
The events of Halo Wars ensue. Silver Team, composed of Riz-028, Kai-125, Vannak-134, Levi-097, Saber-067 and Randall-037 are deployed to Arcadia to hold the line as a quick reaction force. They reinforce the Spirit of Fire and Red Team as they hold out against the Covenant, and proceed to push them from the capital. -
The Spartan-III supersoldiers of Alpha Company are augmented and activated to battle the Covenant. In July 2537, Operation Prometheus occurs, which kills most of Alpha Companys operative members. -
Spartan-III Beta Company is formed following the horrific Operation PROMETHEUS, and begins training. They are activated sometime prior to May 2545. 300 of Beta Companys active roster are deployed to Pegasi Delta on July 3rd 2545 for Operation TORPEDO, which goes almost as catastrophically as PROMETHEUS, and results in the death of all but 2 members. -
Spartan-III Gamma Company begins training to replace the losses of Beta Company. They are trained with assistance of the survivors of Beta Company. In addition to the enhancements received by the previous SPARTAN-III generations, they were injected with illegal drugs that altered the frontal lobes of their brains to enhance aggression, strength, endurance, and tolerance to injury. A majority of Gamma Company leaves Onyx to battle the Covenant, with only 15 remaining for top honors competitions -
Immediately before the Battle of Sargasso, Silver Team is on a routine patrol with an Army fireteam. While deep in conversation with the fireteams medic, Cain-107 removes his helmet temporarily to share a cigar with her. She is shot by a Jackal marksman with a Needle Rifle, causing a supercombination before anyone can react. Shards of her skull and teeth flay 107s face, and blinds his right eye permanently. -
Rear Admiral Y. Terumi is promoted to Vice Admiral, all survivors of the 27th STB, 1st "Venom" Company vanish into thin air, marked as MIA. Vice Admiral Terumi is assigned as the Director of the Anomalous Materials Group, and its Spartan-II Attache "Silver Team" is assigned as his personal bodyguards temporarily. Captain Wesker is pulled from Section 3 to become the new Commanding Officer of the "Venom Company".
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The 12th ONI Battlegroup "Sword of Damocles" is formed under VADM Terumi. To accompany them as their infantry contingent, the 141st Raider Regiment is formed under directive U-1418, which authorizes usage of Insurrectionists and Prisoners of War as combatants against the Covenant. Silver Team is assigned to the 141st as a force multiplier, and partially to monitor Terumi and Wesker, who is now in charge of the 141st. They were known to leave the regiment for periods of time on other missions. -
The 141st Raiders are sent to the Mulltire colony to capture Brigadier General Arnold of the 781st ID on charges of treason and rebellion against the UNSCDF.
Operation Soaring Banner, Gleaming Sword and Black Cloak occur. During Operation Shining Hope, the Covenant arrive in system and immediately assault the Raiders, with them using the 781st as a distraction to escape. BGen Arnold is assassinated by a Kig'yar Sniper. Mulltire is glassed with around 456k casualties total. -
During the UNSC's Defense of Concord, Silver Team is deployed to field-test experimental pieces of MJOLNIR developed by Lethbridge Industrial and other companies. Levi-097 tested and excelled with the Gen1 Venator-Class MJOLNIR.
Saber-067 tested the Gen1 Deadeye-Class MJOLNIR.
Cain-107 tested the Gen1 Hunter-Class MJOLNIR. -
The events of Halo Reach, and Halo: The Fall of Reach ensue. "We knew this day would come. They have found our fortress among the stars. The Covenant are on Reach. They will burn this planet, kill millions, and when Reach falls—and fall it will—there will be nothing left to stand between them - and Earth."
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On or prior to the night of July 23, 2552, the Covenant Fleet of Valiant Prudence arrived at Reach undetected by its defending forces. A small strike force, was dispatched to the Visegrád Relay to cut off communications between Reach and other colonies. ONI assumed that the communications blackout was caused by local Insurrectionists; in response, Colonel Holland dispatched several Army fireteams to the relay. After losing contact with the troopers, SPARTAN Noble Team was sent to investigate. -
On the night prior to the battle, Noble Team, conducted a reconnaissance mission at Szurdok Ridge to determine the Covenant force deployments in the area. They discovered a massive ground army amassing in the plain, with four corvettes hovering overhead. The UNSC responded with a massive ground and air based counterattack the following morning. The mission was a partial success, but was deemed a failure after a CSO Super Carrier struck the area and revealed itself. -
The CSO Supercarrier "Long Night of Solace" is annihilated via a detonating slipspace drive implanted by Noble 6 and 5 into a nearby SDV Corvette, which they pilot towards the supercarrier. 5 Sacrifices his own life to detonate the bomb manually, which destroys both the carrier and corvette. Mere minutes later, an enormous fleet emerges from slipspace and begins to launch a full-scale assault on the planet. -
The events of Halo: Combat Evolved and Halo: The Flood ensue. Over the course of 3 days, the Pillar of Autumn and the Master Chief engage the Covenant over and on Installation 04, unleashing the Flood on accident, and destroying the Ring to prevent its spread. -
The events of Halo: First Strike ensue. Following the Battle for Installation 04, John-117 and a contingent of survivors destroy the Unyielding Heirophant and Vice Admiral Whitcomb sacrifices his life. The survivors escape to Earth and warn them of the imminent invasion. -
The events of Halo 2, Halo Landfall, Halo Uprising, Halo 3, and Halo 3 ODST ensue. "We ran from them. They followed. We thought they'd never find us... we were wrong"
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The events of Halo: Ghosts of Onyx ensue.
On October 31, 2552, the first of the Sentinels to awaken suddenly began attacking UNSC forces on and near Onyx. Coincidentally, Gamma Company was participating in the top honors exercise at the time. Kurt-051 is marked as Missing in Action -
Spartan-III Delta Company is taken to Onyx by a Prowler, but stop midway through transit and are redirected back to UNSC HIGHCOM on Earth due to the Onyx Conflict. They are spoken to by Jun-A266 and Musa-096, becoming the first recruits for the Spartan-IV Program, they are promptly placed into military education programs. after the Battle for Earth. -
The Master Chief and Arbiter attack the Ark following Truths dreadnought, and proceed to assassinate him just before the rings can fully activate. The Flood smash High Charity into the Ark and attempt to stop Installation 08 from firing prematurely, SgtMaj. Johnson perishes due to betrayal from 343 Guilty Spark. John-117 is Missing in Action following his and the Arbiters escape from the installation on the UNSC Forward Unto Dawn. John-117 is lost in space, while the Arbiter arrives on Earth. -
The Voi Memorial is a tribute to the soldiers of the United Nations Space Command, the Unified Earth Government and the Fleet of Retribution who gave their lives during the 28-year Human-Covenant War and formally marked the end of the war. -
The events of Halo: Nightfall ensue. Lieutenant Commander Jameson Locke's team and the Sedran Colonial Guard conduct a mission to Alpha Shard. Only Locke and Macer survive. Locke is later recruited into the SPARTAN-IV program, and is assigned to sensitive operations in the Outer Colonies. Spartan Randall-037 is declared Missing in Action.