Race Overview
The Taiidan were the victors of the ancient war that sent the people of Hiigara into exile to the fringe of the galaxy. Originally a formidable and implacable warrior race, three millennia of Imperial rule left the once-mighty Taiidan as decadent and corrupt as the regime they had overthrown. By the time of the Homeworld War, the Taiidan ruled in name only, their influence spread so thin and fractured that they could not successfully defend themselves against a single determined group of homeworld-seeking Kharakian refugees.
Story

The return of the Exiles to their Homeworld did more than mark a new beginning for life on Hiigara; it also helped to bring about the end of the Taiidan Imperial line, which had ruled continuously for nearly 3,000 standard years.

The Taiidan Empire of Year 0 AL (after landfall - 9510 Galactic Standard Year) held 150 star systems in its grip, but not easily. Emperor Riesstiu IV was rapidly approaching his 4th century of life, and his pogroms and agendas were becoming increasingly bloody and erratic. Relations with other Galactic civilizations were at an all time low, with the Empire receiving regular censure from the Galactic Council during their twice-per-decade assemblies.

The Frerrn Aggregate was in a state of undeclared war with the Taiidan Empire over a number of border issues on the Far Rim, and even the Bentusi had suspended all trade contact with the Taiidan in the year 7 BL (before landfall - 9503 GSY.)

Internal Taiidan politics was faring even worse in these last years of the Empire. Tax revolts in the outer systems were a common occurrence, as Emperor Riesstiu IV's increasing paranoia led to a prohibitively large and expensive military. The Taiidan Assembly of Lords, a token political body whose task was merely to "rubber stamp" edicts from the desk of the Emperor, even began to question some of Riesstiu's more outrageous demands. The entire political system of the Imperium was corrupt and on the verge of collapse when a Mothership of unknown design breached Taiidan borders, and destroyed 3000 years of political stagnation.

A powerful group of military, political and economic figures had been plotting a coup in secret for years, staying only steps ahead of one purge or another as they looked desperately for the trigger that could sway 360 billion souls against their God-like Emperor. Oddly enough, it wasn't the plight of the Kharakian Exiles as much as the mindless obedience of the Taiidan navy which created that trigger. When the first propaganda images spread through the Empire, showing yet another victory, this time against an ancient and forgotten enemy, it soon became obvious that a serious mistake had been made on the part of the Emperor's political advisors. Instead of reassuring the Taiidan people that their nigh-immortal Emperor was all-seeing and all-powerful, the Taiidan reacted with near-universal horror and disgust. Again and again they were forced to watch one of their fleets commit an act of genocide against 300 million aliens, who had committed no crime greater than entering hyperspace and violating a long-forgotten treaty.

The Emperor reacted quickly and ordered the Home Fleet to hunt down and destroy the Exiles before they could penetrate Taiidan space, but it was too late. The political damage had been done, and the secret conspirators launched their coup against an obviously mad Emperor. While the initial groundswell of support was very strong, the conspirators and the general public seriously underestimated how prepared the Empire was for just such a rebellion, and how far their leaders were willing to go in order to maintain their stranglehold on power. After the first few heady days of rebellion, the Emperor declared full martial law across the Taiidan worlds. According to his edict, no act performed in the defense of His Throne would be judged in civilian courts.

The death and destruction that followed this announcement throughout the Empire beggars the imagination. For every military unit that defected to the Coup, 2 others launched an orgy of brutal reprisals. Dukes and Governors that were unwilling to massacre protestors en masse were executed and replaced by ones who would. Entire rebellious asteroid cities were exterminated when navy corvettes destroyed their life support systems, and the slow death throes of millions were recorded, to be shown as an example to the rest of the population. By the end of the first month it was obvious to all but the most optimistic that the Emperor's grip on the Taiidan could not be thrown off. The final blow was nearly struck at the battle of Vorshan's Rift, where the gathered rebel Navy was ambushed and devastated due to a high level defector, who led the rebels into a trap. The ranking surviving military member of the coup fled for his life, directly into the arms of the one force in the galaxy that was successfully resisting Imperial power: the returning Exile Fleet. Luckily for the rebellion, the Exiles aided the Rebel officer, allowing him the chance to escape and regroup the tattered remnants of his fleet.

When news broke that the Exiles were actively aiding the rebellion, it was the final insult to the Emperor. Riesstiu declared that he would personally command the Taiidan High Guard fleet in their crusade against the interlopers. The final battle took place high above the Exile's ancient Homeworld, Hiigara, and when it was over the Emperor lay dead and his Elite guard fleet was shattered. In the resulting chaos, the Rebels seized their last chance and destroyed the Imperial Gene bank. Without a clear line of succession through cloning, the Emperor having long ago executed any living relative who might try to kill him and take power, the Imperial structure collapsed. In its place was erected a new Taiidan Republic.