The Galactic Army of Light was a terrorist organization formed by the Vulcan Sybok in the year 2287. Made up of inhabitants from the planet Nimbus III, the Army's first member was J'onn, a destitute individual whom Sybok was able to relieve of his psychic pain via mental manipulation. Performing this same function on all subsequent recruits, Sybok's aim was to steal a starship, with which to penetrate the Great Barrier surrounding the center of the galaxy.
Kidnapping and holding hostage three ambassadors from the Federation, the Klingon Empire, and the Romulan Star Empire, Sybok and his Army were able to successfully lure the USS Enterprise NCC-1701-A to Nimbus III, and subsequently commandeered the ship. Taking the Enterprise through the barrier, Sybok was able to make contact with an entity whom he believed to be God himself, although it was later learned that it was not God, but rather a malevolent alien whom had manipulated Sybok into bringing him a space vessel. (Star Trek V: The Final Frontier)