Here is a portion of that timeline I mentioned concerning faster than light travel:
Faster than light travel is discovered in 770,000 AD. It is wormhole travel, faster than light communication prior to that allows for Galactic Civilization. Though I suppose if you allow for Star Trek style Transporters through these tiny wormholes, they could be used for "Travel" though I suspect many people would not want to be disassembled atom for atom and the have the information transmitted through wormholes and then have their bodies reassembled atom for atom at the destination - Probably would involve nanotechnology. Robots and computers could probably transmit their software through these wormholes, and would not mind doing this. 770,000 AD is when they build wormholes human beings can travel through in one piece rather than Star Trek Transporter style. A Traveller campaign could probably take place after the Quaoar Device is invented in 88,900 AD. Prior to this the speed of light is the limit.
c.80,250 AD
In an effort to achieve the ancient dream of Faster-Than-Light travel, the Almighty King Alalium orders the construction of a particle accelerator four billion miles wide around the outskirts of the Solar System.
c.82,000 AD
Construction is completed on the Almighty King’s great particle accelerator. A group of the greatest scientific minds from his small empire are immortalized by encasing their brains in jars and installing them in spider robot mechanisms to work for centuries in a secret subterranean base on the ice planetoid Quaoar to operate Alalium’s Accelerator and discover the secret of Faster-Than-Light travel.
c.88,900 AD
The ageless scientist slaves of Quaoar finally succeed in creating what comes to be known as the “Quaoar Device”, which function by maintaining microscopic wormholes.
These impressive machines are capable of allowing Faster-Than-Light communication but not travel.
Infuriated by their perceived failure, the Almighty King orders the destruction of the scientists. He nevertheless utilizes their devices to conquer the largest empire ever seen by Man, ruling hundreds of planets across dozens of parsecs.
The blueprints for the Quaoar Device are stored in Alalium’s Sciocron, a device made to preserve vast amounts of data for vast lengths of time.
89,049 AD
The four inhabited planets of the Lambda Arae System are conquered by Alalium’s Empire forcing the peaceful Jeshuron people into servitude.
~ Secretly, in the outskirts of their solar system, the Jeshuron begin constructing gigantic civilisation ships, the sixteen Vecnos, to usher their people away from servitude and slavery.
c.89,050 AD
A young Jeshuron prophet speaks of the prophecy of the “Astrothanatos”: the destruction of Mankind and the end of his reign in the Universe.
89,630 AD
In the Lambda Arae System: the sixteen Vecnos are completed. The Jeshuron escape their doomed system in their gigantic civilisation ships, some embark towards a supernova that occured in the galactic west, others travel towards Earth to wage a hopeless war with Alalium’s Empire for centuries.
89,630-90,060 AD
The Jeshuron’s Holy War against Almight King Alalium
90,060 AD
The Death of Almighty King Alalium
The catacylismic eruption of the Yellowstone Super-Volcano coincides with the defeat of Alalium’s Empire to the heroic Jeshuron people.
Alalium himself is defeated in hand-to-hand combat with the Jeshuron hero Iaron but mortally wounds his opponent in the process.
The body of Iaron, hero and saviour of the Jeshuron, is sent floating towards the supernova in the west, following the fleet of Vecnos. Meanwhile, Xahn, the enigmatic leader of the Ordaqian Jeshurons, steals away with Alalium’s Sciocron.
c.110,000 AD
Man has colonised 100,000 planets (across 900 parsecs).
c.127,000 AD
The Jeshuron arrive at their destination and discover a beautiful new home for themselves on the planet Leuca.
127,000-134,000 AD
The Seven Thousand Year Peace on Leuca.
c.145,000 AD
Man has colonised 1,000,000 planets (across 1,500 parsecs).
c.420,000 AD
Man has colonised 6,000,000 planets (a quarter of the Galaxy).
~ Colonisation reaches the Galactic Core.
481,830 AD
The planet Antichton, near the center of the Galaxy and destined to one day rule it, is colonised.
c.488,000 AD
The planet Sagarion, in the Sagittarius Arm, is colonised.
c.540,000 AD
Man has colonised 12,000,000 planets (half the Galaxy).
c.597,000 AD
The planet Atreon, in the Crux Arm, is colonised.
c.619,000 AD
The planet Perseon, on the far side of the Galaxy, is colonised.
c.630,000 AD
Man has colonised 19,000,000 planets (three quarters of the Galaxy).
c.678,000 AD
The planet Centarus, on the far side of the Galaxy, is colonised.
c.700,000 AD
Man has completely colonised the Galaxy, inhabiting 25,000,000 planets.
c.743,000 AD
In the nearby Intruder Galaxy, a small satallite galaxy of our own: the planet Darxta is colonised.
c.749,000 AD
On the planet Darxta: King Matan Beliar is approached by a mysterious man known as Abaddon who brings with him, from the far side of the Galaxy, an ancient artifact rumoured to allow Faster-Than-Light communication.
Utilizing this secret, ancient technology, the Darxtarians conquer a large interstellar empire, while Abaddon is granted a fleet of starships to colonise a planet of his choosing a thousand parsecs away, at the other end of the Intruder Galaxy.
The Founding of the Darxtarian Empire
756,145 AD
Abaddon (actually an immortal) and his Darxtarian conquest fleet arrive at the planet Extar and Abaddon is made king.
756,201 AD
The immortal Abaddon begins his great endeavor of creating Faster-Than-Light travel.
770,000 AD
Faster-Than-Light Travel is Invented
After fourteen thousand years of perilous research and arduous work, Abaddon and his humble people finally discover the secret of Faster-Than-Light travel, opening a wormhole portal between Extar and the nearby planet Terminax.