The last surviving head of state to serve during WWII is … Queen Elizabeth II?

Queen Elizabeth II is Britain's longest reigning monarch. However, she was breaking barriers even before the crown became hers. Elizabeth was also the first female of the Royal family to be an active duty member of the British Armed Forces. This also makes her the last surviving head of state to have served during World War II.

When Elizabeth was born in 1926, she was not destined for the throne. Her father, Albert, was the second son of King George V. It wasn't until 1936, when Elizabeth was 10, that her world was turned upside down. It was in this year that her uncle, Edward VIII, abdicated the throne in the name of love and her father became King George VI. This made 10-year-old Elizabeth the heir presumptive.

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It wasn't until World War II that King George VI found his footing as the leader of Great Britain. During this time, despite the repeated aerial attacks by the Nazi air force, the King refused to leave London. The British government urged the queen to take her daughters to Canada, however. She refused stating, "The children won't go without me. I won't leave without the King. And the King will never leave." Elizabeth and her younger sister, Margaret did end up leaving the city, though, just like thousands of other children who were evacuated at the time. The girls spent much of the war at Windsor Castle in Berkshire.

HRH Princess Elizabeth (centre) with officers of the ATS Training Centre. (Wikimedia Commons)

As the war continued, Elizabeth, like many other young Britons, yearned to do her part for the cause. Her very protective parents refused to allow her to enlist. Elizabeth was head-strong though, and after a year of debate her parents relented. In early 1945, they gave the then 19-year-old Elizabeth their permission to join the Armed Forces.

In February 1945, she joined the Women's Auxiliary Territorial Service (ATS). ATS provided key support during the war. Its members were anti-aircraft gunners, radio operators, mechanics and drivers. Elizabeth attended six weeks of auto mechanic training at Aldershot. During this training she learned how to deconstruct, repair and rebuild engines. By July of that year she had risen in the ranks from Second Subaltern to Junior Commander. For the first time, Elizabeth worked alongside her fellow Brits, and revelled in the freedom of it.

She took her ATS duties very seriously. However, the future queen repairing automobiles proved to be irresistible to the press. Her enlistment made headlines around the world as they applauded her commitment to the war effort. The Associated Press deemed her "Princess Auto Mechanic." In 1947 Collier's Magazine wrote, "One of her major joys was to get dirt under her nails and grease stains in her hands, and display these signs of labor to her friends."

Elizabeth was still serving in the ATS when Germany surrendered on May 8, 1945. She and Margaret famously snuck out of Buckingham Palace to join the celebrations in London. Her military service officially ended when Japan surrendered later that same year.

Later, Elizabeth once again overcame objections from her family when she married Philip Mountbatten, a Greek-born officer in the Royal Navy, in November 1947.

Her father, King George VI, led his country through its darkest hour, but the war coupled with a life-long smoking habit left him in poor health. On February 6, 1952, King George VI died in his sleep after a long-suffering battle with lung cancer. This meant that at 25 years old, Elizabeth became Queen.

Even now in her 90s, Elizabeth maintains a love of automobiles. She can still be found behind the wheel of one of the many cars in the Royal collection. She's also been known to jump at the chance to diagnose and repair faulty engines, just as she trained to do more than 70 years ago. She also holds on to her pride in the journey that brought her from military mechanic during World War II to the Crown.