The Babylon Project began in 2248 after the resolution of the Earth-Minbari War, the war itself being the inspiration for the project's foundations. Babylons 1 through 3 were all destroyed during their construction by acts of sabotage. Finally, Babylon 4 was constructed and brought online in 2254 when it disappeared a mere twenty-four hours later. The last of the Babylon stations, Babylon 5, was constructed and placed into orbit of Epsilon III, thanks to substantial assistance from the Centauri Republic and the Minbari Federation. The station came online in 2257 and ultimately served its purpose through frequent diplomatic engagements, first contact situations, ongoing trade, and key roles in several military conflicts.
One by Chameleon Eclectic, two editions of a D20 version, and a Traveller version by Mongoose Publishing.