Diaz, Armando (1861–1928), an Italian army officer. He led Italian forces to victory in World War I. Diaz was named commander of the Italian army in November, 1917, replacing General Luigi Cadorna following the disastrous defeat at Caporetto in October. His troops repulsed an Austro-Hungarian attack during the Battle of the Piave in June, 1918. In October, he ordered an attack on Vittorio Veneto that left the Austrian forces in disarray. Diaz arranged an armistice with Austria-Hungary on November 3. Diaz was made marshal of Italy in 1920 and a duke the following year. He was minister of war, 1922–24.