Luigi Torelli / UIT-25 / I-504

Luigi Torelli was a Marconi-class submarine of the Regia Marina. Launched in 1940, she primarily served as a convoy raider in the Atlantic, interdicting Allied shipping convoys and naval vessels. She would later be converted into a transport submarine to send and collect strategic supplies to and from Japan. When the Italian government signed an armistice with the Allied powers in 1943, the submarine was captured by the German Kriegsmarine, being renamed as the UIT-25 to continue her trips to the Far East. After Germany surrendered in early 1945, the submarine fell into Japanese hands and was re-designated as the I-504 until the end of the war.