 De Grazia co-authored a report on psychological warfare for the Supreme Headquarters of the Allied Expeditionary Force.By the end of the war, he was Commanding Officer of the Psychological Warfare Propaganda Team attached to the headquarters of the 7th Army.With his fiancée and later wife, wife Jill deGrazia (née Bertha Oppenheim), he carried on an extensive wartime correspondence of over 2,000 lengthy letters, published on the web under the title "Letters of Love and War".