The Sorian Protectors were established after the Rakatan's invasion of the galaxy, when the Sorians were introduced to the Force. It turned out that Sori was a planet like Tyhon or Dathomir; it was filled with the Force. The Sorians set up rudimentary testing facilities, and it turned out that nearly a third of the population was sensitive to the Force. Remembering that the Rakatan's sensitivity to the Force was one of the reasons they conquered Sori so easily, the Sorians decided to establish a group of Force-users as a future defense. They initially used Force-enhanced swords forged out of brialk, a very rare metal found in the very peaks of the Sorian mountains, but a few millenia after their creation they were discovered by the Jedi, who revealed to them the secret of the lightsaber.