In 1910, Edward VII died, and Prince George ascended the throne as George V. Mary thus became Queen. During the First World War, Queen Mary was criticized for her German heritage. The conflict with Germany forced George V to change the name of the Royal House from Saxe-Coburg and Gotha to Windsor. He also stripped all titles from those members of the Royal Family who fought for Germany. Following the war, Queen Mary continued her public duties and suffered a family tragedy when she lost her youngest son, Prince John. In 1935, King George celebrated his Silver Jubilee, commemorating 25 years of his reign, and Queen Mary accompanied him during the official tours and visits that took place. Queen Mary used her extensive knowledge of history and royal protocol to advise and support her husband on matters of state.