With the 23rd Battalion, Tull fought on the Italian Front from 30 November 1917 to early March 1918. He was praised for his "gallantry and coolness" by Major-General Sydney Lawford, General Officer Commanding 41st Division, having led 26 men on a night-raiding party, crossing the fast-flowing rapids of the Piave River into enemy territory and returning them unharmed, and in a letter of condolence to his family. The commanding officer of the 23rd Battalion, Major Poole and his colleague 2Lt Pickard both said that Tull had been put forward for a Military Cross. Pickard wrote "he had been recommended for the Military Cross, and certainly earned it." However, the Ministry of Defence has no record of any recommendation but many records were lost in a 1940 fire. It would have been against army regulations for serving officers to inform an officer's next of kin that their relative had been recommended for, and refused, an honour; it was a court-martial offence.