Queen Elizabeth II was a part of the women's Auxiliary Territorial Service during World War II. She trained as a mechanic and a military truck driver, being the first female member of the royal family to become a full-time, active member of the British Armed Forces, and she rose to the rank of junior commander by the end of the war and then, disguised and unnoticed in her army uniform, herself and her sister, Princess Margaret, held hands in jubilation with thousands of revellers gathering in front of Buckingham Palace to celebrate Victory in Europe day in May 1945.