To learn more or opt-out, read our Cookie Policy. When you just focus on Master Chief and Cortana, it is, for the most part. If you want way more detail than we go into here, we recommend you check out this great wiki timeline of the Halo universe. The Forerunners get all the credit in the Halo games, but the Precursors came before, as their name implies. The Precursors helped shape and evolve humans, the Forerunners, and many other races using the Mantle of Responsibility , a creation philosophy.
In the Forerunner-Precursor war, the Forerunners destroyed their creators. The Precursors had apparently decided to pass the Mantle onto the humans — letting them dictate the flow of life in the universe — rather than the Forerunners.
Believing they were the superior creation, the Forerunners obliterated the Precursors and took up the Mantle of Responsibility for themselves. Turning mostly to dust, the Precursors eventually became the Flood, the zombielike parasite that ruins the back half of most Halo games.
Humans eventually discovered the Flood, which started a brief war. Believing humanity was pushing its luck and reaching too far, the Forerunners also went to war with the humans in order to stamp them out.
The humans defeated the Flood but lost to the Forerunners and their Promethean warriors led by the Didact. The Forerunners brought humanity back to the stone age, stripping them of their interstellar travel. The Librarian, a Forerunner, looked over humanity. Without the humans around, the Flood returned and went to war with the Forerunners. Losing the war, the Forerunners constructed and activated the titular Halo rings, which were designed to destroy all life that the Flood could potentially prey upon — starving the Flood, ensuring its demise.
They worship the Forerunners and therefore the Halos. Many generations after being punished by the Forerunners, the humans were back to traveling the galaxy and making colonies on lesser planets.
But some of the colonies were unhappy with the politics of Earth. A minor insurrection against the UNSC began to build across several planets. So naturally, the UNSC started abducting children. Catherine Halsey led the program, and abducted gifted 6-year-olds for it. The Spartan-II cadets received training and, eventually, physical augmentations — which came with a rather low survival rate.
One of the first Spartan-IIs to graduate from the program and the first one Halsey met with as a 6-year-old was John, more often known by his number , or his rank: Master Chief. Going forward, keep in this in mind: The Spartans were originally designed to quell a human civil war, not fight the Covenant. In the middle of the insurrection of the human colonies, the Covenant appeared and attacked Harvest, a human planet.
A high-ranking commander finds a Forerunner relic on Harvest, which is why the Covenant are there. The UNSC chase the Covenant through the galaxy and to the resting site of a dormant Forerunner fleet, which the humans prevent the Covenant from acquiring. Halsey, so she can lead a ship called The Pillar of Autumn to a new Forerunner artifact. Noble Team helps beat the Covenant down as much as possible over the course of the game, and creates an opening for The Pillar of Autumn — which also contains Master Chief frozen in cryosleep.
Noble Team eventually succeeds, but every member of the squad dies, and almost all of Reach is glassed by the Covenant. Hood deployed Blue Team to Onyx, who stole a Covenant destroyer to reach the planet in time. Meanwhile, the Covenant Separatists under the leadership of Imperial Admiral Xytan 'Jar Wattinree had deployed a fleet to Onyx to claim the "sacred relics" for their fight against the Jiralhanae and the other Loyalists.
Xytan would not live to hear of the results of this mission, as he and the majority of his fleet were annihilated by a UNSC Nova bomb recovered from Reach. They managed to hold off hundreds of Covenant troops before being forced to retreat into the Core, while Kurt sacrificed himself by detonating a couple of FENRIS Nuclear Warheads , killing the entire Separatist force.
Following the Core being sealed, Onyx broke up into trillions of Sentinels, guarding the construct. With the Covenant Separatists dangerously depleted, the warlike Sangheili were finally forced to ally with their hated enemy, humanity. Following the Flood infestation of High Charity , the High Prophet of Truth led the remaining loyalist Fleet to Earth to complete what the previous mission to Earth had not.
Little did he know that a Spartan-II had stowed away with him on board his Dreadnought. However, the Covenant Loyalist fleet was also vastly reduced and focused on securing an enormous unearthed Forerunner structure near the ruins of New Mombasa. With the arrival of John, the remaining UNSC forces launched an assault on the area, sweeping aside all Covenant resistance and finally launching an all-out attack on the Prophet of Truth's Forerunner ship.
Unfortunately, even in-atmosphere MAC strikes proved ineffective against the Forerunner dreadnought, and Truth quickly activated Voi's portal and escaped. Events were further complicated by an unexpected attack by the Flood. Thanks to the timely arrival of the Sangheili, the Flood force was vanquished but not before Master Chief recovered a recording from Cortana, who had stayed behind on High Charity. Cortana's message told of a means to stop the Flood on the other end of the portal.
The Covenant Fleet above the Ark immediately attacked. Though the joint Human-Sangheili fleet was outnumbered , the battle ended in defeat for the Covenant Loyalist Fleet.
The final battle of the war was fought in December as Truth attempted to activate the Halo rings. Led by John, the Human forces, despite fanatic resistance managed to smash through the remaining Covenant forces on the ground. The battle was complicated by the arrival of High Charity. As the Flood began to spread, John and the Arbiter went on to thwart Truth, who died in mid-Flood-infection at the Arbiter's hand. John deactivated the Halo Array and brought an end to that threat as well.
The Flood still remained a threat, but were destroyed by John, the Arbiter, Cortana and Sergeant Johnson by firing the Halo over the Ark, destroying the parasite and the installation. Although Forward Unto Dawn managed an emergency slipspace jump, the portal collapsed splitting the vessel in half. Trapped in the rear section of the frigate, John placed himself into cryosleep until he could be retrieved, eventually drifting to a Forerunner world.
The UNSC's greatest soldier, and humanity's champion, was presumed dead. Some months later, in March 3 of , a monument was erected on a hillside near the Portal to the Ark to commemorate the billions of men and women killed during the war, and John's name was included as he was presumed MIA by the UNSC, as no Spartan could be declared dead for such morale purposes.
Lord Hood shook hands with the Arbiter to signify an end to hostilities. The fate of the Prophet's was especially ironic, as the infestation of High Charity resulted in the near extinction of their race. The most destructive conflict in human history had ended in victory, but at a staggering cost.
Both the UNSC and the Covenant Separatists then turned to the enormous task of rebuilding their once great societies after that. Part of the wreckage of the destroyed Installation Halo Alpha Explore. Getting Started. Administrators Guidelines Online Chat. Halo Recruit , Windows Halo: Fireteam Raven , Arcade cabinet.
Cryptum Primordium Silentium The Cole Protocol Envoy New Blood Bad Blood Evolutions Fractures Saint's Testimony Shadow of Intent Other Media.
Explore Wikis Community Central. Register Don't have an account? Human-Covenant war. Edit source History Talk Battles of the Human-Covenant war. Wars in human history. Human-Flood war c. Wars In Covenant History. Cancel Save. Universal Conquest Wiki. United Nations Space Command. Unknown, likely in the hundreds of millions or billions. Hierarchs , High Council. Multiple worlds - different member races, High Charity Political and Religious capital.
Covenant Loyalists. Doisac , Eayn , and Palamok. A few weeks after this defeat, the Prophet of Regret discovered the location of a significant Forerunner artifact on his own. Without knowledge of the fact the planet housing this artifact was the human homeworld, Regret led a small fleet of fifteen ships to Earth, in order to locate a portal to an installation known as " the Ark ".
The Covenant ground troops quickly spread through the city, destroying both military and civilian resistance, but a counter-attack by the Marines and John resulted in their swift defeat.
With his fleet burning in orbit, Regret was forced to retreat. His carrier jumped into slipspace from within the city, damaging it severely. Following Regret's jump, waves of Covenant reinforcement forces, including a support fleet sent by the Prophet of Truth, arrived, resulting in a month-long constant engagement on Earth.
Unfortunately for Regret, four human ships, the In Amber Clad among them, had followed them through their own slipspace rupture to Delta Halo. At that moment, High Charity , having learned of Delta Halo, arrived and launched multiple waves of Phantom dropships to aid Regret. These forces were withdrawn by the Prophet of Truth as part of his plan to remove the Sangheili from power in the Covenant. However, Truth ultimately underestimated the full impact his 'reforms' would have on the Covenant's chances for military victory.
The Master Chief assassinated Regret, dealing a heavy blow to the Covenant's political structure. The Prophet of Truth then gave the order to glass the temple in which Regret resided. John narrowly survived only to be captured by the Gravemind , who had already formed a plan to prevent the Covenant from completing their Great Journey.
Meanwhile, the majority of the human forces on In Amber Clad had traveled to Delta Halo's Library to obtain the Index , which is the key to firing Halo. Originally, the Covenant had been unaware of the Index's importance, but luckily for them, Arbiter Thel 'Vadamee had obtained Guilty Spark , the monitor of Installation 04 , while destroying the Heretic base.
The mission was complicated though by the unexpected release of the Flood. Despite this, the Arbiter successfully reached the Library and prevented the humans from claiming the Index. Just as Miranda Keyes claimed the index, the Arbiter stole it from her, kidnapping her and Sgt.
However, the Index was stolen from the Arbiter by the Jiralhanae Chieftain Tartarus , who was under the Prophets' orders to retrieve the Index and kill the Arbiter, whom Tartarus knocked down an apparently bottomless shaft. Ultimately this led to the death of Tartarus at the hands of 'Vadamee and Johnson and a temporary alliance between the Sangheili and the human forces. Delta Halo was prevented from firing by Miranda Keyes while the Flood infected and absorbed the Prophet of Mercy , leaving the Prophet of Truth firmly in control over the Covenant Empire.
However, the UNSC had no idea that the planet was in fact a huge Forerunner structure , integral to the Halo Array , and composed of trillions of Sentinels. After the humans failed to exchange the proper counter-responses, the Sentinels relabeled the Reclaimers as an "aboriginal subspecies" and began to exterminate them.
Knowing that the Forerunner technology buried in Onyx's core could turn the tide of the war for humanity, Halsey used Forerunner technology to send a message to Fleet Admiral Sir Terrence Hood , requesting reinforcements.
Hood deployed Blue Team to Onyx, who stole a Covenant destroyer to reach the planet in time. Meanwhile, the Sangheili forces under the leadership of Imperial Admiral Xytan 'Jar Wattinree deployed a fleet to Onyx to claim the "sacred relics" for their fight against the Jiralhanae.
Underneath Onyx, the Spartans had discovered the core room antechamber and held off hundreds of Covenant troops before being forced to retreat into the shield world in the core. With their forces dangerously depleted, many of the warlike Sangheili subsequently allied with their former enemy, humanity, under the Arbiter's leadership. Following the Flood infestation of High Charity , the High Prophet of Truth led his remaining fleet to Earth to complete what his occupation forces on Earth had started.
However, the attacking Covenant armada was also vastly reduced and focused on securing an enormous unearthed Forerunner structure near the ruins of New Mombasa.
With the arrival of John, the remaining UNSC forces launched an assault on the area, sweeping aside all Covenant resistance and finally launching an all-out attack on the Prophet of Truth's Forerunner Dreadnought.
Unfortunately, even in-atmosphere MAC strikes proved ineffective against the ancient ship's hull, as Truth quickly activated the Portal and escaped. Events were further complicated by an unexpected attack by the Flood. Thanks to the timely arrival of the Sangheili, the Flood force was vanquished but not before Master Chief recovered a recording from Cortana, who had stayed behind on High Charity.
Cortana's message told of a means to stop the Flood on the other end of the portal. The final battle of the war was fought on December 11, As they arrived, the Covenant fleet above the Ark immediately attacked.
Though the joint human-Sangheili fleet was outnumbered , the battle ended in defeat for Truth's Jiralhanae fleet. The battle was complicated by the arrival of High Charity. As the Flood began to spread, the Chief and the Arbiter went on to thwart Truth, who died in mid-Flood-infection at the Arbiter's hand with the Flood helping to reach him. John deactivated the Halo Array, preserving all life within its firing pattern.
With the Covenant forces completely shattered, Truth's death marked the effective end to the war. Although Forward Unto Dawn managed to reach the portal, the portal collapsed splitting the vessel in half.
Trapped in the rear section of the frigate, John placed himself into cryosleep until he could be retrieved, eventually drifting to the Forerunner shield world of Requiem. The UNSC's greatest soldier, and humanity's champion, was presumed dead. The plan was that if Earth fell, Gray Team would retaliate against the Sangheili who led the naval fleets that destroyed human colonies by attacking a Sangheili world.
During the Battle for Earth , Gray Team received a message stating Condition Endgame, meaning that the Covenant had appeared in the Sol system and the Cole Protocol had finally failed to protect the planet.
Unable to reach Sanghelios as it was too well defended, Gray Team instead targeted the colony world of Glyke , home to billions of Sangheili. Though the war ended, Gray Team's ship had a damaged deep-space communications device and thus could not receive any orders to cease or withdraw. Confident that humanity was about to be destroyed, Gray Team took a vote and decided to carry out the mission, hoping that the slaughter would stop humanity's extinction.
With their ship damaged by the blast, Gray Team was forced to evacuate aboard their lifeboat and was left adrift in Glyke's remains, asleep in cryo chambers. On March 3, , a monument was erected on a hillside near the Portal to the Ark to commemorate the billions of men and women killed during the war, and John 's tag was included as he was presumed MIA by the UNSC, as no Spartan could be declared dead.
The Treaty of was eventually signed between humanity and the Swords of Sanghelios, officially ending the war for the two factions. As part of the treaty, neither faction was allowed to return to the remains of Installation 04 with a return being considered a severe violation of the peace. The Great Schism, now the Sangheili-Jiralhanae war , would continue for at least another six years between Sangheili and Jiralhanae factions, further depleting their now crumbling infrastructure.
Their reliance upon the sciences and technology of the Forerunners, while neglecting their own, proved a weakness. The fate of the Prophets, after the infestation of High Charity resulted in the near-extinction of their race, now hangs in the balance, with little more than a thousand survivors able to flee to unknown space. The most destructive conflict in modern human history had ended in the survival of humanity, but at a staggering cost. Both the UNSC and the former members of the now-broken Covenant then turned to the enormous task of rebuilding their once great societies.
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