The Women's Army Auxiliary Corps (WAAC), known as Queen Mary's Army Auxiliary Corps (QMAAC) from 9 April 1918, was the women's corps of the British Army during and immediately after the First World War. It was established in February 1917 and disbanded on 27 September 1921.

Alexandra Mary Chalmers Watson CBE,, known as Mona Chalmers Watson, was a British physician and head of the Women's Army Auxiliary Corps. The first woman to receive an MD from the University of Edinburgh, she helped found the Elsie Inglis Hospital for Women, was the first president of the Edinburgh Women's Citizen Association, a staff physician and later senior physician at the Edinburgh Hospital and Dispensary for Women and Children, and co-edited the Encyclopaedia Medica with her husband, Douglas Chalmers Watson. At the time of her death in 1936, she was president of the Medical Women's Federation, having been elected May 1935.