De Luce left his position in Budapest to cover the onset of the war in Poland. During the war, he covered the Italian assault against Albania and the Greek assault against the Italians, British retreat from Burma, American campaigns in North Africa and Italy. He also reported from Tunisia, Sicily, Turkey, and crossed the neck of Cap Bon to report on the German battle lines of North Africa. In 1944, Daniel De Luce earned the Pulitzer Prize for Telegraphic reporter (International) for his correspondence on the partisan resistance led by Marshal Josip Broz Tito in Yugoslavia.