It had only been six months after the Battle of Hogwarts. After their second escape at Malfoy Manor, Harry, Hermione, and Ron took a month to get back to the Order. By the time it was possible to make contact, the Order had regrouped in the ancestral Longbottom estate. They had put the entire 15,000 acres under the Fidelius Charm, and the matriarch Augusta was the secret keeper. She never left the grounds.