It is only now that Harry discovers that under the Ministry's influence the newspaper The Daily Prophet has launched a smear campaign against anyone who claims that Voldemort has returned, leaving Harry feeling isolated and betrayed by the Wizarding community. After experiencing horrible nightmares depicting the evil Lord Voldemort's return, Harry is awoken by the arrival of an advance guard of wizards who escort him to the headquarters of the Order of the Phoenix, a secret organization founded by Dumbledore. Shortly thereafter, the Ministry of Magic detect the act of underage wizardry and attempt to have Harry expelled from Hogwarts immediately, but this is modified to a trial later in the summer. Harry Potter and his cousin Dudley Dursley are attacked by two Dementors, but Harry manages to drive the Dementors off with a Patronus charm.
