Unity Mitford summered at the Berghof where she continued to discuss a possible German-British alliance with Hitler, going so far as to supply lists of potential supporters and enemies. At the 1939 Bayreuth Festival, Hitler warned Unity and her sister Diana that war with Britain was inevitable within weeks and they should return home. Diana returned to England, while Unity chose to remain in Germany, though her family sent pleas for her to come home. After Britain's declaration of war on Germany on 3 September 1939, Unity was distraught. Diana Mitford told an interviewer in 1999: "She told me that if there
Diana (mythology) goddess of the wilderness and the hunt, but was often worshiped as a patroness of families. She served a similar function to the hearth goddess Vesta, and was sometimes considered to be a member of the Penates, the deities most often invoked in household rituals. In this role, she was often given a name reflecting the tribe of family who worshiped her and asked for her protection. For example, in what is now Wiesbaden, Diana was worshiped as "Diana Mattiaca" by the Mattiaci tribe. Other family-derived named attested in the ancient literature include "Diana Cariciana", "Diana Valeriana", and "Diana Plancia".