Important Events
The Harvest Campaign was a five-year campaign to retake the planet Harvest after the Covenant took over the planet and wiped out the colony on Harvest.
The Battle for Arcadia was a battle for the colony Arcadia in the Procyon system, which occurred in the immediate aftermath of the Harvest Campaign.
The Battle of the Etran Harborage was a battle between the UNSC Spirit of Fire and Covenant forces lead by Arbiter Ripa 'Moramee on Shield World 0459, also known as the Etran Harborage.
The Fall of Reach was possibly the largest battle during the Human-Covenant War, taking place in the Epsilon Eridani system, in orbit and on the ground of Reach, humanity's largest military stronghold.
The Battle of Installation 04 was an engagement between the UNSC Pillar of Autumn and the Covenant Fleet of Particular Justice on and around the Forerunner megastructure known as Installation 04, or Alpha Halo, in the Soell system.
The Battle for Earth was a large-scale space, air, and ground battle between the invading Covenant forces and the UNSC Home Fleet on and around Earth at the end of 2552.
The Onyx Conflict was a major engagement between UNSC, Covenant, and Forerunner forces on and around the planet of Onyx in the Zeta Doradus system in October and November 2552.
The Battle of Installation 05 was an engagement between the Covenant forces, including those that fled the Battle for Earth, High Charity, and the Second Fleet of Homogeneous Clarity, and the UNSC-allied forces, including the UNSC In Amber Clad led by Miranda Keyes, and the Fleet of Retribution led by the Arbiter Thel 'Vadam.
The Battle of Installation 00 was a major conflict between the forces stationed aboard the UNSC Forward Unto Dawn and Arbiter Thel 'Vadam's Fleet of Retribution, and the Covenant fleet loyal to the Prophet of Truth.
The Battle of Requiem was a conflict between former Covenant forces under the command of Jul 'Mdama, UNSC forces from the UNSC Infinity and Forward unto Dawn, and Promethean forces under command of the Ur-Didact on Forerunner Shield World 0001, also known as Requiem, in July 2557.
The Mission to Mount Kilimanjaro was a trek undertaken by 343 Guilty Spark, Rion Forge, and the crew of the Ace of Spades to find the Librarian and, in the case of Spark, gain access to the Domain in September 2557.
The Raising of the Guardians was a series of events involving the awakening and unearthing of Forerunner ships known as Guardians by Cortana in late October 2558.
The Battle of Genesis was an engagement between the UNSC, Promethean forces under command of Cortana, and the remains of Jul 'Mdama's Covenant forces on the artificial Forerunner installation known as Genesis in October 2558.
The Second Ark Conflict was a battle between the UNSC forces aboard the Spirit of Fire and the Banished forces under command of Atriox on Installation 00 in 2559.
Important Events
The Harvest Campaign was a five-year campaign to retake the planet Harvest after the Covenant took over the planet and wiped out the colony on Harvest.
The Battle for Arcadia was a battle for the colony Arcadia in the Procyon system, which occurred in the immediate aftermath of the Harvest Campaign.
The Battle of the Etran Harborage was a battle between the UNSC Spirit of Fire and Covenant forces lead by Arbiter Ripa 'Moramee on Shield World 0459, also known as the Etran Harborage.
The Fall of Reach was possibly the largest battle during the Human-Covenant War, taking place in the Epsilon Eridani system, in orbit and on the ground of Reach, humanity's largest military stronghold.
The Battle of Installation 04 was an engagement between the UNSC Pillar of Autumn and the Covenant Fleet of Particular Justice on and around the Forerunner megastructure known as Installation 04, or Alpha Halo, in the Soell system.
The Battle for Earth was a large-scale space, air, and ground battle between the invading Covenant forces and the UNSC Home Fleet on and around Earth at the end of 2552.
The Onyx Conflict was a major engagement between UNSC, Covenant, and Forerunner forces on and around the planet of Onyx in the Zeta Doradus system in October and November 2552.
The Battle of Installation 05 was an engagement between the Covenant forces, including those that fled the Battle for Earth, High Charity, and the Second Fleet of Homogeneous Clarity, and the UNSC-allied forces, including the UNSC In Amber Clad led by Miranda Keyes, and the Fleet of Retribution led by the Arbiter Thel 'Vadam.
The Battle of Installation 00 was a major conflict between the forces stationed aboard the UNSC Forward Unto Dawn and Arbiter Thel 'Vadam's Fleet of Retribution, and the Covenant fleet loyal to the Prophet of Truth.
The Battle of Requiem was a conflict between former Covenant forces under the command of Jul 'Mdama, UNSC forces from the UNSC Infinity and Forward unto Dawn, and Promethean forces under command of the Ur-Didact on Forerunner Shield World 0001, also known as Requiem, in July 2557.
The Mission to Mount Kilimanjaro was a trek undertaken by 343 Guilty Spark, Rion Forge, and the crew of the Ace of Spades to find the Librarian and, in the case of Spark, gain access to the Domain in September 2557.
The Raising of the Guardians was a series of events involving the awakening and unearthing of Forerunner ships known as Guardians by Cortana in late October 2558.
The Battle of Genesis was an engagement between the UNSC, Promethean forces under command of Cortana, and the remains of Jul 'Mdama's Covenant forces on the artificial Forerunner installation known as Genesis in October 2558.
The Second Ark Conflict was a battle between the UNSC forces aboard the Spirit of Fire and the Banished forces under command of Atriox on Installation 00 in 2559.
Evo-014's Summary
In the expansive realm of Halo's narrative, military themes predominantly prevail. Nonetheless, the universe boasts a diverse array of significant characters who do not directly partake in military service. Instead, they contribute to the military's endeavors through various means, whether it be overseeing the entirety of the Spartan-II Program, assuming the role of the science officer aboard the Spirit of Fire, or disseminating ONI propaganda to bolster the war effort.
Seekers of Truth
Doctor Catherine Halsey embarked on numerous clandestine ventures during her tenure with the Office of Naval Intelligence. However, her most notorious undertaking remains the Spartan-II program, a venture in which her integral involvement was indispensable. Professor Ellen Anders, regarded by many as equally brilliant as Doctor Halsey, played a pivotal role in crucial events such as the Battle of the Etran Harborage and the Second Ark Conflict, where her contributions proved to be the linchpin between defeat and victory. Rion Forge, driven by the desire to locate her father, stumbled upon a revelation of far greater magnitude than she could have ever envisioned. Meanwhile, Ben Giraud relentlessly toiled to uncover the truth shrouding the Spartan-II program, an endeavor met with resolute opposition.Ancient Humanity
In epochs long past, the civilization of ancient humanity traversed the cosmos, establishing a sprawling empire amid the celestial realms. However, the destiny of their empire took a fateful turn when it clashed with the formidable Forerunners, culminating in a cataclysmic conflict that ultimately led to the obliteration of the ancient human dominion and the regression of their species.Artificial Intelligences
Within the expansive ranks of the UNSC, the number of AIs is so vast that it defies enumeration. However, among this multitude, a select few AIs stand out as the most influential and arguably the most astute. Notable among them is Cortana, renowned for her remarkable abilities while collaborating with John-117, yet equally infamous for her betrayal of humanity in the year 2558. Another prominent figure is Roland, whose unwavering loyalty makes him the dedicated shipboard AI of the UNSC Infinity. Despite not being originally designed for military purposes, Isabel has seamlessly adapted to her role, thanks to her formidable intellect. In the annals of AI history, Serina is often regarded as possibly the most brilliant AI of her era, although much of her potential lay dormant after the Spirit of Fire was left adrift. Finally, the enigmatic Black-Box emerges as a contender for the title of the smartest AI in the post-war era, although his intelligence might well be matched by Cortana's.Forerunners
The Librarian always had a penchant for operating in the shadows, a trait she retained even beyond her demise. She continued to exert her influence, aiding Master Chief in his struggle against the Ur-Didact a hundred millennia after her own passing. As for the IsoDidact, he did not actively seek out his role, but when thrust into it, he embraced the mantle of leadership that the galaxy so desperately required during the twilight days of the Forerunners.