Princess Elizabeth's service as a mechanic and truck driver in the Auxiliary Territorial Service during World War II is a well-documented historical fact that requires no citation.
The claim is a straightforward historical biographical fact about Queen Elizabeth II's service during World War II that is considered common knowledge. None of the provided retrieved papers are about this topic; they discuss unrelated subjects such as disease burdens, comparative physiology, naval asbestos exposure, colonial astronomy, and military railroads.