Moore was best known for his career as one of the most in-demand accompanists of his day, accompanying many of the world's most famous musicians. He accompanied notable instrumentalists such as Pablo Casals. As a commissioned officer in the Second World War Moore was assigned his own Batman, a soldier chosen personally from his own men. Moore would have chosen Samuel because he must have been a trustworthy, loyal, hardworking soldier. With a position like this Samuel would have been exempt from more onerous duties and would have received better rations and other favours. Senior officers' batmen usually received fast promotion to a higher rank.
Samuel enlisted as part of the 6th Battalion of The York and Lancaster Regiment. In 1943 the 6th Battalion was part of the 46th Infantry Division, who in 1943 and until the end of the war fought with the Eighth Army in Italy.
The Eighth Army participated in the Italian Campaign which began with Operation Husky, the invasion of the island of Sicily by Eighth Army and U.S. Seventh Army. When the Allies subsequently invaded mainland Italy elements of Eighth Army landed in the 'toe' of Italy in Operation Baytown and at Taranto in Operation Slapstick. After linking its left flank with the US Fifth Army which had landed at Salerno on the west coast of Italy south of Naples, Eighth Army continued fighting its way up Italy on the eastern flank of the Allied forces. At the end of 1943 General Montgomery was transferred to Britain to begin preparations for the Normandy invasion. Command of the Eighth Army was given to Lieutenant General Oliver Leese. Following three unsuccessful attempts in early 1944 by US Fifth Army to break through the German Winter Line, the Eighth Army was covertly switched from the Adriatic coast in April 1944 to concentrate all forces, except the V Corps, on the western side of the Apennine Mountains alongside US Fifth Army in order to mount a major offensive with them and punch through to Rome. This fourth Battle of Monte Cassino was successful with Eighth Army breaking into central Italy and Fifth Army entering Rome in early June.
Samuel certainly saw action during his career but chose not to talk about it. He did however, whilst serving in Italy, meet a young Italian girl with whom he fell in love and intended to marry. He arrived home to Yorkshire and informed his family of his plans, his mother was, by all accounts furious, and refused to let him marry her and forbade him not to return to her in Italy, he did as he was told.
Samuel died unmarried in 1954.