1. Edith Campbell served with the Canadian Army Medical Corps in the First World War and was one of the first Canadian nurses to arrive in England to assist in the establishment of the Duchess of Connaught Canadian Red Cross Hospital, a field hospital in Taplow, Buckinghamshire, and serve during the First World War.
Edith Campbell later served on the Western Front, being awarded the Royal Red Cross, first class, and the Military Medal.
Edith Campbell arrived in the United Kingdom on 24 October 1914 on the HMT Franconia.
Edith Campbell stated to Osler, as he attempted to reinstate her reputation, that "the worst wars are not all in the trenches".
Osler believed that Edith Campbell had been unjustly dealt with and in response, threatened to resign.
Discussion of the affair was forbidden in the Osler household and Edith Campbell did not regain her position as matron.
On 22 June 1915, Edith Campbell was mentioned in despatches for her actions in England and France, and in October of that year she received the Royal Red Cross, first class.
Edith Campbell returned to France in 1916, and was mentioned in despatches for a second time in 1917 for her bravery during enemy air raids at No 1 Canadian General Hospital in Etaples, France, during which she attended to wounded nurses.
Edith Campbell continued to serve with the Canadian Expeditionary Force until April 1919, when she was demobilised and returned to Canada.
On her return to Canada, Edith Campbell became superintendent of the Toronto Branch of the Victorian Order of Nurses.