Halo

Hundreds of thousands of years ago, the Mantle of Responsibility belonged to the Forerunners. However, the Precursors wanted to remove such power from Forerunner hands and give it to the human race. In retaliation, the Forerunners drove the Precursors into extinction. Among the last of the Precursors, one let out a spore, hoping for it to spread and repopulate the Precursors. It spread like wildfire. However, instead of creating Precursors, the spore made a parasite known as the Flood. The Forerunners fought the Flood, which spread through infestation of sentient life and had overrun much of the Milky Way Galaxy. Exhausting all other strategies, the Forerunners conceived the Halo Array — ring-shaped megastructures and weapons of last resort that would destroy all sentient life in the galaxy to stop the Flood. Delaying as long as they could, the Forerunners activated the rings and disappeared.[ Nearly a hundred thousand years later in the 26th century, humanity—under the auspices of the United Nations Space Command, or UNSC—colonized many worlds thanks to the development of faster-than-light "slipspace" travel. Tensions between the government and colonies desiring independence sparked violent clashes. The UNSC sponsored the SPARTAN-II Project to create an elite group of enhanced supersoldiers, whose purpose was to suppress the rebellions covertly.[16] In the year 2525, human worlds came under attack by a theocratic alliance of alien races known as the Covenant, whose leadership declared humanity heretics and an affront to their gods — the Forerunners — and began a genocidal holy war. The Covenant's superior technology and numbers proved decisive advantages; though effective, the Spartans were too few in number to turn the tide of battle in humanity's favor. After the Covenant invaded Reach, the UNSC's last major stronghold besides Earth, Master Chief John-117 was one of the few remaining Spartans left.

The rediscovery of the Halo rings set the humans against the Covenant, who believe they are instruments of transcendence, not destruction. Master Chief and his artificial intelligence Cortana were instrumental in the destruction of a Halo ring to stop the Covenant and the threat of the Flood. The Covenant descended into civil war following the expulsion of the Sangheili species, with many grappling over the revelation that their religion is false. The disgraced former Covenant Sangheili commander known as the Arbiter, along with the rest of his race, helped the humans destroy the Covenant and stop its leader, Truth, from activating the Halo Array via the Ark. The Human-Covenant War ended, though new conflicts begin to emerge throughout the universe.

In the post-war era, the UNSC created a new generation of Spartans, and tensions between the UNSC and colonist rebels resumed. The Forerunner known as the Didact briefly returned to assert supremacy over humanity, though he was foiled by the Master Chief and Cortana, who was believed to have perished in the attempt. Cortana's survival through the Forerunner repository of knowledge known as the Domain led her to break with the UNSC and assert a new hegemony over the galaxy, with artificial intelligence (the "Created") in control. After two years of a scattered war between Cortana and the UNSC, Cortana attacks the Banished, a mercenary organization largely led by the Jiralhanae race. The Banished win the resultant conflict, terminating Cortana and battle the UNSC for control of Zeta Halo.

Ranks:

Master Chief - Owner

Noble 6 - second in command.

Emile - over 2M total energy

Spartan - over 500k total energy

soldier - Soldier of UNSC