Cecile Margot Lefort served in the Women's Auxiliary Air Force (WAAF) and in France for the United Kingdom's clandestine Special Operations Executive (SOE) during the Second World War. The purpose of SOE was to conduct espionage, sabotage and reconnaissance in occupied Europe against the Axis powers, especially Nazi Germany. SOE agents allied themselves with French Resistance groups and supplied them with weapons and equipment parachuted in from England.

The Women's Auxiliary Air Force (WAAF), whose members were referred to as WAAFs, was the female auxiliary of the British Royal Air Force during World War II. Established in 1939, WAAF numbers exceeded 181,000 at its peak strength in 1943, with over 2,000 women enlisting per week.