With the outbreak of the First World War, Raymond immediately applied to the chaplain-general for service overseas with the army. He had an eventful war and served as chaplain to the 10th battalion of the Manchester Regiment (1915–17), to the 9th battalion of the Worcestershire Regiment (1917 and 1919), to the East Lancashire territorials in Gallipoli in August 1915, and on five other fronts: Sinai, France and Belgium, Mesopotamia, Persia, and Russia.