Rules on dating in the army
The meeting broke up with the agreement that sessions were to begin once a suitable location in which to train had been found. Umbridge used the information to implement Educational Decree Number Twenty-Four, which banned all student organisations that were not approved of by the High Inquisitor. Initially, Ron thought that a student at the meeting had betrayed them, until Hermione pointed out that if they had, she would have known about it due to the jinx she placed on the parchment that they all signed.
Although not revealed at that time, Aberforth Dumbledore also relayed information about the D. Despite the ban, Harry assured all the members that the meetings would go ahead once an ideal location was found. Soon, Harry was informed the Room of Requirement by the house-elf Dobby, who occasionally used it to store the drunken house-elf Winky. During the first session, Cho Chang created the name Defence Association, but Ginny Weasley suggested to make the letters DA stand for a different name of their group, Dumbledore's Army, to frighten the Ministry officials, since they were frightened that Dumbledore was creating an army to take over the Ministry;.
Since the Daily Prophet smear campaign against him, many of the students considered him to either be a liar or insane.
In the Hog's Head, Harry was surprised to see a fair number of students from Gryffindor, Hufflepuff, and Ravenclaw turn up, although he harboured the suspicion that a few, such as Zacharias Smith, only wanted to hear about the night Cedric Diggory was murdered.
When Zacharias Smith scoffed at its simplicity and wondered about its effectiveness, Harry responded that it was the spell that saved him from Lord Voldemort in the Little Hangleton graveyard.
Prince Harry has been accused of breaking military rules by wearing a beard while on official duty in a British Army uniform.