Although she passed the entrance exam for Somerville College, Oxford, in 1917, she chose to join the Women's Army Auxiliary Corps (WAAC) in early 1918 but soon after she arrived in France, the First World War came to an end and she returned home. During this period, Holtby met Harry Pearson, the only man who stimulated romantic feelings in her, due primarily to his tales of the suffering soldiers endured during the war.