During the First World War, 2,845 women served as nursing sisters with the Canadian Army Medical Corps. Although the majority of those who enlisted had pre-war training, these experiences did not prepare them for the severity of the injuries they treated, the relentless pace of the work, and the pressures of working within a warzone. How did these women cope with the traumas they witnessed during their service when they returned home? Of the 842 nursing sisters who applied for a pension, 143 (16.7%) reported ongoing mental and nervous illnesses. The postwar experiences of these women reveal some of the traumas and challenges that military nurses faced overseas and when they returned home.