Following Order 66 from Star Wars: Revenge of the Sith, many Jedi survived and went into hiding. While Stormtroopers could have flown around the galaxy, searching for the survivors, the Empire needed a specialized group of people for the task. Force-sensitive individuals received training after being tortured and coerced to follow the dark side of the Force in order to track down and eliminate the remaining Jedi. This became known as the Inquisitorius Program, or the Order of Inquisitors. While Darth Vader oversaw the program as a whole, the Grand Inquisitor, a former Jedi Temple Guard, was in charge of all Inquisitors.