Italian battleship Impero

Impero was the fourth built for Italy's "Regia Marina" (Royal Navy) during the Second World War. She was named after the Italian word for "empire", in this case referring to the newly (1936) conquered Italian Empire in East Africa (Somaliland, Eritrea and Ethiopia territories) as a result of the Second Italo-Abyssinian War. She was constructed under the order of the 1938 Naval Expansion Program, along with her sister ship "Roma".
"Impero" was laid down in May 1938 and launched in November 1939. The entrance of Italy into World War II forced the "Regia Marina" to refocus its construction priorities on escort warships, so "Impero" was left incomplete. After Italy surrendered to the Allies on 8 September 1943, the rest of the Italian Navy steamed to Sardinia to rendezvous with their American contemporaries. Still incomplete in Trieste, "Impero" was captured by the Germans, who used the hulk for target practice. Sunk by Allied bombers in February 1945, she was refloated in 1947 and scrapped in Venice from 1948 to 1950.
Background.
The Italian leader Benito Mussolini did not authorize any large naval rearmament until 1933. Once he did, two old battleships of the were sent to be modernized in the same year, and and were laid down in 1934. In May 1935, the Italian Naval Ministry began preparing for a five-year naval building program that would include four battleships, three aircraft carriers, four cruisers, fifty-four submarines, and forty smaller ships. In December 1935, Admiral Domenico Cavagnari proposed to Mussolini that, among other things, two more battleships of the "Littorio" class be built to attempt to counter a possible Franco-British alliance—if the two countries combined forces, they would easily outnumber the Italian fleet. Mussolini postponed his decision, but later authorized planning for the two ships in January 1937 for the 1938 Naval Expansion Program. In December, they were approved and money was appropriated for them; they were named and "Impero".
Description.
"Impero" was long overall and had a beam of and a draft of . She was designed with a standard displacement of , a violation of the restriction of the Washington Naval Treaty; at full combat loading, she displaced . The ship was to be powered by four Belluzo geared steam turbines rated at . Steam was provided by eight oil-fired Yarrow boilers. The engines provided a top speed of and a range of at . "Impero" would have had a crew of 1,830 to 1,950 if she had been completed.
"Impero"s main armament would have consisted of nine 50-caliber Model 1934 guns in three triple turrets; two turrets were placed forward in a superfiring arrangement and the third was located aft. Her secondary anti-surface armament would have consisted of twelve 55-caliber Model 1934/35 guns in four triple turrets amidships. These were to be supplemented by four 40-caliber Model 1891/92 guns in single mounts; these guns were old weapons and were primarily intended to fire star shells. "Impero" was intended to be equipped with an anti-aircraft battery that comprised twelve 50-caliber Model 1938 guns in single mounts, twenty 54-caliber guns in eight twin and four single mounts, and sixteen 65-caliber guns in eight twin mounts.
The ship was protected by a main armored belt that was with a second layer of steel that was thick. The main deck was thick in the central area of the ship and reduced to in less critical areas. The main battery turrets were thick and the lower turret structure was housed in barbettes that were also 350 mm thick. The secondary turrets had 280 mm thick faces and the conning tower had thick sides. "Impero" was to be fitted with a catapult on her stern and equipped with three IMAM Ro.43 reconnaissance float planes or Reggiane Re.2000 fighters.
History.
Authorized to be built by Ansaldo of Genoa, the new battleship's keel was laid down on 14 May 1938 and launched on 15 November 1939. At her launching, she was christened "Impero", after Italy's empire in Africa. With Genoa being in bombing range of France, and war now a definite possibility, "Impero" was moved to Brindisi on 8 June 1940 due to fears of French attack. Trieste was considered a better location, but "Roma" was fitting out there and the shipyard could not handle two battleships at one time. While at Brindisi, some of her machinery was installed, along with parts of her smaller caliber weaponry. Despite the intent to move "Impero" to a safer location, Brindisi was still hit by Allied bombers, though "Impero" was not damaged. Nevertheless, the "Regia Marina" decided to shift production priorities to desperately needed escorts for merchant convoys. As a result, construction of "Impero" was delayed to expedite those ships. The only work done was the fitting of the engines and some gun mountings.<ref name="GD412/13">Garzke & Dulin, pp. 412–413</ref>
Fitted with small-caliber anti-aircraft and anti-surface weaponry, "Impero" was sailed—using her own propulsion—to Venice on 22 January 1942. At some later time, she was moved again to Trieste, though no further work was done on the ship. After Italy's capitulation to the Allies in September 1943, "Impero" was seized by the Germans, who intended to break her up for scrap. This was evidently never completed, as the hulk was discovered by Allied forces in Trieste after the war half-sunk. The Germans had instead used her as a target ship and the Allies had damaged her during an air attack on 20 February 1945. "Impero" was stricken from the naval register on 27 March 1947. The hulk was raised sometime that year and towed to Venice and beached, where she was scrapped from 1948 to 1950.
At the time of the capitulation, "Impero"s hull was 88% complete and the engines were 76% complete, but overall the ship was only 28% complete; it would have required about eighteen more months of full work to be finished. Key features like the armament, electrical wiring and a reworking of the bridge had still not been completed.