program. According to the breeding program, she was to produce a daughter, who would be bred with Feyd-Rautha, a nephew of Baron Vladimir Harkonnen. However, Jessica falls in love with Leto and grants him the son he desires. Although Paul is a boy, Jessica gives him some training in the Bene Gesserit ways, including enhanced observation and the Sisterhood's specialized martial art. Initially described as "small for his age", Paul has secretly undergone the early Mentat training, and is also schooled in weapon use by Gurney Halleck and Duncan Idaho. In Dune (1965), Paul is fifteen years old; the Padishah Emperor Shaddam IV orders the family to leave Caladan and govern the desert planet Arrakis (known as Dune), though Paul's father Duke Leto is in full knowledge that the Emperor is colluding with House Harkonnen to destroy the Atreides as a perceived threat to the throne. On Dune, the family is betrayed by their Suk doctor, Wellington Yueh. He disables the House defensive shields, allowing the Imperial Sardaukar troops, dressed in Harkonnen uniforms, to capture Duke Leto and Thufir Hawat and to kill most of the Atreides army. Duncan sacrifices himself while attempting to hold off the Sardaukar and ensures Paul's escape. His betrayal motivated by the Baron's capture and torture of his Bene Gesserit wife, Yueh implants a poisonous gas capsule concealed within a false tooth on Duke Leto after his capture and instructs Leto to use it to kill the Baron. Shortly afterward, the Baron has Yueh murdered. Upon meeting Baron Harkonnen and his twisted Mentat Piter De Vries, Leto bites down on the capsule. He succeeds in killing De Vries — and himself — but not the Baron. Fed a poison for which only the Baron has the antidote, Hawat is forced to serve as the new Harkonnen Mentat. With some help from Yueh, Paul and Jessica escape into the desert. They flee to the Fremen, who see in Paul the Lisan al-Gaib or "the Voice from the Outer World", a prophet they call the Mahdi whom they believe is "The One Who Will Lead Us to Paradise". Paul and Jessica take shelter in Sietch Tabr, a Fremen settlement led by the naib, Stilgar. Paul and his mother train the Fremen in weapon use and martial arts, creating a formidable army. When Paul is accepted into the Fremen tribe, he is given the secret "sietch name" Usul,