The Beginning
The events in Homeworld take place in The Galaxy, a spiral galaxy known as the Whirlpool Galaxy, is about 76,000 lightyears in diameter, relatively small for a galaxy in comparison with the Milky Way.
In spite of its size, the Galaxy has supported several powerful empires such as the Progenitors, the Hiigaran Empire, and the Taiidan Empire.
The Naggarok was an alien exploration vessel that journeyed to the Galaxy from a neighboring galaxy using an experimental hyperdrive of immense power. When the ship emerged from hyperspace it was carrying a strange and malevolent form of life (later to be given the moniker The Beast) which had not been present at the start of its journey. When the aliens on-board the vessel realized this lifeform's destructive capabilities they decided to destroy the vessels engines and communications array, thus trapping the creature inside. However, the ship launched its emergency beacon with a small sample of Beast cells on-board.
The Progenitors
With the few records we have on them, the Progenitors are the oldest known race in the universe. They arrived before the Galactic Dating System (GDS) began. Their empire and influence spanned nearly the entire galaxy, and many Progenitor relics have been found in its farthest corners.
The Progenitors possessed highly advanced technology that far surpassed that of all other space-faring civilizations even millenia after their departure from the galaxy.
The Progenitors also developed extremely powerful hyperdrives capable of making galactic jumps in less than a second and transporting whole fleets within the galaxy and beyond. This hyperdrive technology led to the Eye of Aarran, a vast network of self-supported hyperspace gates stretching throughout the galaxy. The Progenitors left their three Hyperspace cores hidden in different places throughout the Galaxy.
The Bentusi
The Bentusi, an ancient race of space-fairing technology traders, call themselves the Unbound which means to be directly connected with their ships. By doing so, the Bentusi are able to control their ships with direct thought allowing quick reactions and fewer staff to perform the same operations. They also have significantly longer lifespans and refer to other non-unbound races as having flicker lives.
The earliest known event in Bentusi history was when the Bentusi discovered the First Hyperspace Core in a massive Progenitor ship, becoming the first known race to acquire far-jump technology. While others in the galaxy had hyperspace technology, none could travel at the distance and speed the Far-Jumper would allow. With it, the Bentusi could travel hundreds of light years and more within one or two minutes. Fortunately, the Bentusi used this new-found technology to keep order and peace in the galaxy.
Using the hyperspace core, the Bentusi quickly established the Old Trade Routes which were widespread across hundreds of worlds, bringing their technology to many races. Soon after, the Bentusi took it upon themselves the mantle Galactic Peacekeepers.
Using the far-jumper housed in their mothership, Bentus, the Bentusi could send their entire fleet to quell interplanetary wars with their superior technology. However, many systems did not like being little more than protectorates of the Bentusi, and began conspiring with other planets to bring an end to the Bentusi's "tyranny".
The Uprising
Almost overnight, thousands of wars broke out across the galaxy. The Bentusi fleet, though indisputably powerful, could not tend to every incident at once. As the dust settled, several new Empires had been formed, and the Galactic Council was formed from the Hiigaran, Taiidan, and 14 other empires. The Bentusi supremacy had ended.
Of the many empires that emerged stronger after Bentusi's reign was lost, the Hiigarans gain control of all the planets under the Daiamid, their governing council. The Hiigarans are a humanoid race hailing from Hiigara at the edge of the Galactic Core. Through their trials they have proven to be a group of proud, cunning and intellectual people.
Another to gained power from Bentusi's fall was the Taiidan Empire, also known as the Taiidan Imperium, which was one of the oldest states in the Galaxy. The Taiidan and Hiigaran Empires shared the same area of space.
War Between Hiigara and Taiidan
Bad blood between the Hiigaran and Taiidan led to many disputes among border planets of their respected empires. With tensions and battles increasing, the Galactic Council intervened and favored with the Taiidan Empire. The Taiidans had bribed, blackmailed, and even assassinated members of the Council to insure they gained the upper-hand in the dispute. Along with many planets awarded to the Taiidans, the Council also forbid the Hiigarans from entering a 30 light-year zone and in doing so would return serious reprisals.
It seemed all hope was lost for the Hiigaran Empire, until exploration of the Great Wastelands unearthed an artifact that would prove to be the most important discovery in their history. The Second Hyperspace Core.
With extensive re-engineering of the containment unit, it is mounted within the Sajuuk's Wrath, the newly constructed flagship of the Hiigarans.
Unfortunately, the Higgarans abused the power of the Hyperspace Core and jumped deep into Taiidan Empire territory, attacking many border patrols. Before the first report of attack reached the Imperial Palace on the planet Taiidan, the Hiigaran fleet was already above its orbit and began using Low Orbit Atmospheric Deprivation Weapons and killing the emperor himself. The Hiigarans then departed, satisfied that the threat of the Taiidan Empire was neutralized.
The Galactic Council reach a decision much faster than the Hiigarans had expected. The Hiigarans are forced to abandon every vessel belonging to them that existed within the 30-light-year exclusion zone, turn over their Hyperspace Core and retreat from the worlds they had conquered. The Hiigarans are given 24 hours to comply or face the severest consequences.
The Hiigarans send word to the Galactic Council, informing them that they agreed to the stated conditions. However, they plan to give the core only to the Bentusi. As Bentus came closer to Sajuuk's Wrath to extract the Hyperspace Core, the fleet powers up under emergency procedures and attack Bentus before it can react.
However, the Bentusi had more experience and capabilities than the Hiigarans. Bentus launched combat-ready vessels, while their own Hyperspace Core jumped other Bentusi Exchanges into the heart of battle from nearby staging grounds. While the Hiigarans fought on, Sajuuk's Wrath leapt from flank to flank, blinking in and out of hyperspace and bolstering the Hiigaran forces wherever it was needed, the Bentus outmaneuvered it each time. After many hours of solid, bloody combat, there was nothing left of the Hiigaran Navy beyond debris and their Flagship. The Bentusi offered surrender and the Hiigarans refused. The Bentus destroyed the engines of Sajuuk's Wrath in an effort to preserve the Hyperspace Core. Instead, the Hiigaran commander jumped Sajuuk's Wrath into the Gravity Well of Angel Moon, destroying the ship and presumably the Core as well. It's said that the Daiamid had been told of the suicide plan before the attack, and knew where to look for the core in the future.
In the aftermath of the overwhelming Hiigaran defeat, the Galactic Council granted the remaining Hiigarans their freedom under the condition that they would never again prepare for war or bring arms against others.
The Bentusi felt responsible for stripping the power of hyperspace from the Hiigarans who were immature in using its ability. They had made errors of their own and easily saw that they too could have been in the same situation as the Hiigaran if another, older race had the power before them. A time of mourning was at hand, and the Bentusi disarmed and demilitarized every vessel they commanded. They vowed never to wage war for the cause of peace and to never have influence on the Council again.
Riesstiu's Revenge
Without an emperor, the Taiidan Empire was in disarray. Admiral Riesstiu, the only remnant of their once fearsome navy, declared himself the sole commander of the Navy. He acted quickly and brought justice to each Hiigaran border planet, forcing them to join or die. The Taiidan had developed weapons that would cleanse the entire surface of a planet and were horribly eager to use them on each planet which refused to be a part of the Taiidan Empire. Hundreds of millions of lives were ended without warning for a crime of which they were ultimately innocent. Some of the planets had "converted too easily" according to the admiral and razed them anyway. More lives were lost in the space of Riesstiu's Revenge than had been lost in all recorded battles since the Outer Rim Trade Routes were first established.
The Galactic Council threatened sanctions against Riesstiu and the Taiidan, but they carried on without care. The Council and independent worlds called for the Bentusi to intervene with force - yet they would not. Instead they volunteered to adjudicate discussion between Riesstiu and the Hiigaran Diamid in pursuit of an acceptable resolution.
The Fate of Hiigara
The admiral's demands were simple, all Hiigaran worlds would now belong to the Taiidan Empire. Hiigara itself would be the new site of the Imperial Palace. Every native Hiigaran would be executed or pressed into slavery depending on their level of involvement in the war upon Taiidan's Homeworld. The Diamid could not move the admiral on any point and the Hiigarans, who had completely given up hope on a life worth living, prepared for the end.
The Bentusi, shamed by their part in the Hiigaran downfall, continued to negotiate with the Galactic Council, the Hiigaran Diamid, and Admiral Riesstiu of the Taiidan. The finally came to a common ground. The Hiigarans would have a single month to board a sub-light transport fleet departing towards the galactic outskirts of the established trade routes. Any left behind would be enslaved or executed, but those willing to accept the arrangement would be dispatched. The one thing they must never do again: develop Far Jump hyperspace technology. If they were to venture beyond their planet with the now-missing core or another like it, their destruction would be sealed. The Hiigarans agreed because they did not have a better chance at survival other than exile.
Before leaving their home system, the Hiigarans secretly retrieve the Second Hyperspace Core from the Angel Moon and stow it upon a Khar-Toba ship. They hoped one day their ancestors may have the chance to regain their home and their empire.