99,871 BCE - 23,009 CE
The Triumvirate Civilization was a polity controlling the entirety of Via Sagittaria and its satellites from 17,520 BCE to 15,089 BCE. After 15,089 BCE it remained as a great power controlling a large portion of the Ventemir Galaxy until 16,789 CE, when it was destroyed by a coalition of other nations in Ventemir. Fragments of the civilization carried on until well after 20,000. As a polity, it operated as an autocracy with not one but three leaders. These leaders were members of the Legion species and were known as Auluer, Legio, and Holo. The Triumvirte Civilization was the first known Via Sagittarian nation to achieve the status of "Superpower" as it was capable of influence on the scale of the entire local universe.
Forming in 99,871 BCE, the nation existed over 75,000 years before they came to control Via Sagittaria. The farthest artifacts attributed to this civilization can be found in the Occult Galaxy. It seems that, had it not fallen, the Triumvirate would have been able to hold influence over most of the nearest groups to Via Sagittaria.
The Triumvirate gave most of its subjects limited self-governance, technology, and information in exchange for allowing the Triumvirate to build a military base in their system while also signing a peace treaty. Species that refused were attacked relentlessly until they were subjugated. The Triumvirate's leaders did not believe in genocide, preferring subjugating their enemies to than exterminating them.
As the most recent of the "ancient civilizations" of the Local Universe, The Triumvirate has had long-lasting effects on the modern Via Sagittaria galaxy. It introduced the concept of interstellar civilization to most species in the galaxy. Even simple things such as the concept of flags and capital worlds were all adopted from the Triumvirate (although some species developed these systems independently). The Triumvirate started a precedent of holding the idea of expansion in high regard, and to this day, its imperialism is mimicked by many nations across the Local Universe. To this day, the Triumvirate is held in high regard as a sort of "precursor civilization" despite the existence of well-known ancient civilizations such as Sedrua.
The Triumvirate was founded on Veritas in 99,871 BCE when its three inhabitants (Legio, Holo, and Aeluer) decided that working together would be more beneficial than staying apart. They were forced to remain in their home system, however. At the time, Sedrua controlled a large portion of the Ventemir galaxy and expansion would put The Three at risk of retaliation by Sedrua (which did not take too kindly to rogue super-intelligent hiveminds as the three Legions were).
Eventually, when Sedrua abandoned the satellites in 59,700 BCE, The Triumvirate decided to begin expansion efforts aimed mostly at stealing technology left behind Sedrua rather than to develop it themselves. The strategy proved successful with a great increase in technological prowess taking place within the Triumvirate. The Legions had a fairly easy time developing the technology and even improving upon it, allowing them to, within the next 20,000 years, take all of Ventemir for themselves.
By 31,300 BCE, the Triumvirate began its expansion into Via Sagittaria. There were thousands of fertile worlds abandoned by Sedrua, many of which still had inhabitants. To prevent any rival powers from rising up, the Triumvirate quickly subjugated most of Via Sagittaria. Their ships, adapted directly from their Sedruan predecessors, were unmatched in both speed and power. Their conquest was met with little resistance. The majority of the species in the galaxy were open to the idea of living under the Triumvirate as it was their first encounter with any outside species. Sedrua, while most certainly a major force in Via Sagittaria, did little to contact its native inhabitants.
In 17,520 CE, the Triumvirate became a Kardashev III civilization and unmatched in not only the Via Sagittaria galaxy but the Local Universe as well. While Sedrua still had large amounts of influence, the Triumvirate surpassed it once it began expansion into galaxies such as the Sheol Galaxy and the Occult Galaxy. It ruled all of its possessions fairly, often transplanting useful species from one part of the galaxy to another to use as local governance. While this theory remains unproven, the Legions made a modified version of themselves into a species called the Gainge. The Imperial Era saw the three Legions act as one with little to no animosity amongst themselves. The majority of decisions were made by sophisticated algorithms and when they did need to make a choice, they always defaulted to the most logical solutions. Existing without emotions, sentimentality, or bias, corruption was non-existent within the Triumvirate. While allowing their subjects to self-govern, all corruption was met with harsh punishments that often included capital punishment.
The leaders of the Triumvirate would grow more reliant on the algorithms with time, choosing to focus on various projects they saw as more beneficial. They reasoned that, so long as no outside force intervened, they would have no need to focus fully on their civilization. Sedrua was on the decline, other entities were virtually powerless compared to them, and they were available at a moment's notice if need be anyways. Legio spent most of their time in the Occult Galaxy overseeing the creation of the Caligne Ring, bent on unraveling the mysteries of Psychokinesis. Holo spent most of their time fixated on the idea of conquest, obsessed with the toppling of enemies. In its pursuits, it created what would later be known as the ERS Moon Signal, TRS Last Waltz, TRS Night Running, and hundreds of other weapons that far outclass even modern ones. Lastly, Aeluer became fascinated with itself, doing everything it could to enhance its own experience in the universe. It augmented itself with machines to the point of being an artificial intelligence itself.
These projects were all incredibly resource intensive to the point that they began to feud over the resources of the Triumvirate. What started as logical debate over the best usage quickly became what was often passive-aggressive rearrangement of resource redistribution. From there, they often became openly hostile to one another, each wanting to use all the resources they could for their projects. Each was overly obsessed to the point of defying all logic. For the first time in their existence, they began disagreeing with each other on how to best approach a certain decision. In 15,109 BCE, the algorithm tasked with governing the Triumvirate was unable to process their contradictory commands. As such, it gave them an ultimatum: it would stop accepting orders until they would start agreeing again. Immediately, The Three began not only becoming more aggressive, but now blaming each other for failing to have "reasonable positions." As the Administrator stopped supplying subjects with materials, they began rebelling. All at once, the Yohjan Confederacy, The Empyrean, and the Lowuks Entente formed in the galaxy, greatly reducing the amount of territory under the control of the Triumvirate.
The Administrator, sensing that the Legions would end up destroying each other, intervened in their fighting. It forced several species still loyal to the Triumvirate to continue developing military technology, continue research on how to improve Auluer, and continue research into military craft. When the Legions saw that the Administrator was able to effortlessly juggle all three of their desires, they stopped fighting. Rather than using the Administrator as a tool to govern, the Legions began treating it as an equal of sort, meant to solve disputes and cause greater cohesion.
Unfortunately for The Three, their fighting caused them to lose so much territory that they lost their status of superpower. Across the galaxy, those who were once their subjects were now great powers of their own rivalling the Triumvirate in both scale and might. It only had a handful of allies, the Orcubor nations being most of them. From 14,000 on, the Triumvirate had been a shell of itself, unable to exert influence on the scale it once had.
Now that the galaxy was full of other powers, the Triumvirate adopted a new strategy, one based not on conquest but at improving their military prowess at all costs, hoping for an opportunity to reconquered their former subjects.
As the name implies, the Triumvirate had official three heads of government, Legio, Holo, and Aeluer. Originally, they cooperated perfectly. As hiveminds, their vast intelligence dwarfed that of any other entity in the galaxy. They were able to multitask to the point of being able to juggle millions of tasks at once. Originally, they were all the government that their empire needed. When all they had to rule over was two small species and an otherwise empty galaxy, all facets of governance were handled by them.
As their civilization expanded to control the majority of Via Sagittaria, even their vast intelligence could not keep up with the tasks presented. As such, they began relying on one algorithm, simply called The Algorithm to govern in their stead. By 25,000 BCE, the Three found themselves with more free time than they ever had before, allowing them to become more involved with their personal projects. They had no need to interfere with what was essentially an autonomous galaxy. All they had to do was occasionally give affirmation to the Algorithm to make sure it was unable to make drastic changes without their approval.
In addition to the Algorithm was a massive bureaucracy made up entirely of Atlins, the first species integrated into the Triumvirate. They were responsible for routing corruption in the Provinces, a task the Three believed the AI was ill equipped to handle. They approved new colonization projects, had limited control over resource allocation, and were officially equal to the Algorithm as they only answered to the Three.
Each species integrated into the Triumvirate, save for the Atlins, were given a province to live in. The Province was made up of every system with a permanent population and a handful of stars known as a "buffer" which the inhabitants could freely use. Each province had a local government, functioned under democracy, and were allowed to enforce their own laws. So long as they would operate without corruption, they were independent.
The only species not contained in a Province was the Atlins. They were within the "Federal Territory," the region of space between provinces. They were free to expand as they pleased so long as they notified the Algorithm that they were doing so. They were more strictly scrutinized by the Legions themselves, but as time went on they were more or less on their own in governance.
Only a handful of nations coexisted with the Triumvirate, the most major of which being Sedrua. When The Triumvirate came to control Via Sagittaria, The Sedruans still had great influence in Aylothn. Despite several attempts to create relations, the Sedruans would not even allow the leaders themselves to negotiate. Trade was non-existent.
The Triumvirate turned their attention to both the The Proto-Empyrean and Hand of God civilizations instead. Both had populations devoted to slightly different variations of the religion, "Fuukanism." They were invariably hostile throughout their histories and only occasionally held talks with the Three. In 18,612 CE, The Triumvirate declares war on the two and, using their superweapons, made short work of their main militaries. The rest of the conflict was chasing after guerillas. They essentially exterminated the inhabitants of the Hand of God civilization and almost did the same with the Empyrean, however, they opted instead to incorporate the species as a province without their knowledge.
Other civilizations such as the Un'oit were largely ignored due to their lack of relevance on the galactic stage.
Based on various historical records, artifacts, and testimonies, the Triumvirate did indeed have the status of "Kardashev III." The vast majority of its energy came from Recurrent Nova Engines located in Ventemir, with the rest of their territory contributing little to their overall power consumption. It was much more efficient to strategically build power collectors in valuable parts of Via Sagittaria than to take random systems. From these points they would deploy cheap slower-than-light Von Neumann probes designed to build infrastructure that would make true colonization easier.
At their peak, days before they fell, they had 550 billion stars in their sovereign control. The majority of these stars were in the large spirals, Via Sagittaria and Occult. The rest were in the various large satellites they controlled. In order: Ouranir, Ventemir, Rune, Sheol, Err, Florescence, Resplendence, Ejeunor, Cerise, and Ryutt. There were several dozen other, smaller galaxies under their control as well, each of them added together still smaller than Ryutt.
The Triumvirate built the first Hyperlanes in Via Sagittaria. By 10,000 BCE, there were large hyperlanes connecting Vertias and Forma to resource-rich areas such as the Yggdrasil Nebula. Most of the provinces remained isolated from this network, however. The Three reasoned that if the species under their control united, they would potentially be able to overthrow them, hence why the provinces would remain isolated from one another.
The Triumvirate constructed several billion Dyson Swarms throughout the galaxy and its satellites. The majority of which never even came into use. Those that were used existed to fund the various projects of the Three.