During WWI, men's deficit was filled by women occupying roles such as postal and transport services operators, and some other administrative roles in the army such as clerkship, cookery, mechanical maintenance, domestic services and nursery.
During WWII, Women were recruited and granted the choices of working in industries or joining "The Auxiliary Services", such as: The Women's Royal Naval Service, The Auxiliary Territorial Service, or "the Women's Auxiliary Air Force", allowing them to serve in positions of not combat (different from nurses); and eventually there were over 100 roles, like assisting anti-aircraft batteries, maintaining the air crafts, organizing weather reports, assigned to shore-based jobs, and working in intelligence; thus allowing more men to be released for front lines.
