In 1806, when Prussia declared war on France, the Duke of Brunswick, 71 at the time, was appointed commander-in-chief of the Prussian army. On 14 October of that year, at the Battle of Jena, Napoleon defeated the Prussian army, and, on the same day, at the battle of Auerstadt, the Duke of Brunswick was seriously wounded, dying a few days later. The Duchess of Brunswick, with two of her sons, and a widowed daughter-in-law, fled her ruined palace for Altona, and then fled to Augustenborg, a small town east of Jutland.
The Duchess of Brunswick remained here, residing with her niece, Princess Louise Augusta, daughter of her sister Queen Caroline Mathilde of Denmark, until her brother, George III finally relented, in September 1807, and allowed her to move to London. She moved to Montague House, Blackheath, in Greenwich, with her daughter, the Princess of Wales, but soon fell out with her daughter, and purchased the house next door, Brunswick House, as she renamed it. The Duchess of Brunswick lived out her days in Blackheath and died, in 1813, aged 75.
Augusta was granted use of the arms of the kingdom, differenced by a label argent of five points, the centre bearing a cross gules, the other points each bearing a rose gules.[4]
The generations indicate descent from George I who formalised the use of the titles prince and princess for members of the British Royal Family. Where a princess may have been or is descended from George I more than once her most senior descent, by which she bore or bears her title, is used.