When World War II erupted the princess and queen, Elizabeth II, was thirteen years old, and her sister Margaret was eight. In 1940 Elizabeth and her sister created a UK radio station for children. When she reached the age of sixteen, Elizabeth joined the war effort, and she remained the only woman from the royal family serving in the army until the end of the war, and in 1943 she appeared on the cover of the magazine "Life" which was about the war. Her father, King George, initially rejected the idea of ​​his daughter joining the war effort, but she was able to persuade him later. At the age of eighteen, she began her military career as a junior officer, where she learned car mechanics, truck driving, and ambulances, and her mother, Queen, also named Elizabeth, visited her during her military service.

The princess was known as Mechanic No. 230873. During this time, she learned how to change car tires and dismantle or reinstall engines. One newspaper article spoke in 1947, saying that she “was happy when her nails got dirty with car oil, showed grease on her hands, and showed oil stains in front of her friends,” and she enjoyed the hard work of repairing cars. King George confirmed that his daughter did not obtain a special rank or special treatment in the army, as the Queen began her military life like any young British woman who joined the war effort. After the war, Princess Elizabeth completed her course at the mechanical training center and became a qualified mechanic and driver, and some sources say that after the end of the war the princess was infiltrating from the royal palace to mix with the public. The eighth day of 1945, which is the Victory Day for Europe, is the last day that she leaves Buckingham Palace to spend time with her subjects, without revealing her identity.

After she became a queen, the British often watched her driving by herself, and many media outlets often commented on how comfortable she was behind the wheel. The Queen is the only person in the United Kingdom who is permitted to drive without a driver’s license, as part of the “royal powers”, powers and exclusive rights of the country’s king. Post-World War II British Prime Minister Winston Churchill showed great respect for the Queen, and an appreciation of the wartime role she played in uniting the British and raising their morale.