In September 1938, the UK established the Women's Territorial Auxiliary Service, a military structure designed to allow women to serve in non-combat roles during World War II. This initiative came at a time when British army regulations strictly isolated women from combat fields, yet it opened opportunities for women to engage in various support tasks, including anti-aircraft defense, communications, and kitchen duties. The service was distinct from nursing roles, which were reserved for a separate unit, the Queen Alexandra's Imperial Military Nursing Service.

Initially, joining the Women's Territorial Auxiliary Service was voluntary; however, as World War II loomed, a compulsory enlistment was introduced to free up men for combat duties. This mandatory draft began with unmarried women aged 20 to 30 and extended to married women later, although exceptions were made for expectant mothers and women with young children. The creation of this service represented a significant shift in women's roles within the military framework, underpinning the societal changes that the war would precipitate.

Princess Elizabeth's involvement as a driver symbolizes not only her personal commitment to supporting the war effort but also highlights how women of all backgrounds were mobilized during the conflict. The Women's Territorial Auxiliary Service provided essential support that was crucial to military operations, marking a pivotal moment in the history of women's participation in the armed forces and paving the way for future generations of women in military and service roles.