Queen Elizabeth, The Mechanic

This LIFE photo from April 1945 shows the last surviving head of state who served in uniform during World War II.

Via: LIFE

At the age of 19, Queen Elizabeth II (service number 230873) joined the Auxiliary Territorial Service (ATS) in February 1945.  She was recruited as a an honorary Second Subaltern, becoming a trained mechanic and truck driver, and promoted to honorary Junior Commander 5 months later.

Via: dailymail

Fun Fact: Winston Churchill's youngest daughter Mary was also a member of the ATS.