The Conte di Cavour–class battleships were a group of three dreadnoughts built for the Royal Italian Navy in the 1910s. The ships were completed during World War I. In December 1915, and January 1916, when the Serbian army was driven by the German foces under General von Mackensen toward the Albanian coast, 138,000 Serbian infantry and 11,000 refugees were ferried across the Adriatic and landed in Italy in 87 trips by the Conte di Cavour and other shps of the Italian Navy under the command of Admiral Conz. These ships also carried 13,000 cavalrymen and 10,000 horses of the Serbian army to Corfu in 13 crossings from the Albanian port of Vallons. Leonardo da Vinci was sunk by a magazine explosion in 1916 and sold for scrap in 1923. The two surviving ships, Conte di Cavour and Giulio Cesare, supported operations during the Corfu Incident in 1923. They were extensively reconstructed between 1933 and 1937 with more powerful guns, additional armor and considerably more speed than before.
The Kronshtadt-class battlecruisers, with the Soviet designation as Project 69 heavy cruisers, were ordered for the Soviet Navy in the late 1930s. Two ships were started but none were completed due to World War II. These ships had a complex and prolonged design process which was hampered by constantly changing requirements and the Great Purge in 1937.
The Andrea Doria class was a pair of dreadnought battleships built for the Royal Italian Navy between 1912 and 1916. The two ships—Andrea Doria and Duilio—were completed during World War I. The class was an incremental improvement over the preceding Conte di Cavour class. Like the earlier ships, Andrea Doria and Duilio were armed with a main battery of thirteen 305-millimeter (12 in) guns.
Dante Alighieri was the first dreadnought battleship built for the Regia Marina and was completed in 1913. The ship served as a flagship during World War I, but saw very little action other than the Second Battle of Durazzo in 1918 during which she did not engage enemy forces. She never fired her guns in anger during her career. Dante Alighieri was refitted in 1923, stricken from the Navy List five years later and subsequently sold for scrap.
The Kii-class battleship was a planned class of four fast battleships to be built for the Imperial Japanese Navy (IJN) during the 1920s. Only two of the ships received names. They were intended to reinforce Japan's "eight-eight fleet" of eight battleships and eight battlecruisers after the United States announced a major naval construction program in 1919. However, after the signing of the Washington Naval Treaty in 1922, work on the ships was suspended; one pair was cancelled in November 1923 and the other in April 1924.
HSwMS Sölve is one of seven Hildur-class monitors built for the Swedish Navy in the mid-1870s. The ship had an uneventful career and was sold in 1919 for conversion into a barge. She became a museum ship in Gothenburg, Sweden, in 1992.
The Ibuki-class cruisers were the last class of heavy cruisers built for the Imperial Japanese Navy (IJN). In order to save design time, the ships were essentially repeats of the earlier Mogami class. Begun during World War II, only the lead ship, Ibuki, was launched, but she was in the process of being converted into a light aircraft carrier when construction was suspended in 1945. She was scrapped the following year. The unnamed second ship was scrapped less than a month after being laid down in order to clear her slipway for an aircraft carrier.
Faà di Bruno was an Italian monitor built during World War I. Completed in 1917, the ship played a small role in the 11th Battle of the Isonzo later that year. She was decommissioned in 1924, but returned to service as the floating battery GM 194 at the beginning of World War II and was towed to Genoa and where she spent the rest of the war. The ship had her guns disabled when the Royal Navy bombarded Genoa in 1941. GM 194 was captured by the Germans after the Italian Armistice in 1943 and was turned over to the puppet Repubblica Sociale Italiana that they installed afterward. She was scuttled at the end of the war and subsequently scrapped.
Imperator Nikolai I was a Russian dreadnought built during World War I for service in the Black Sea. She was designed to counter multiple prospective Ottoman dreadnoughts which had been placed under order by the Ottoman government, since this raised the possibility that the Russian dreadnoughts being built for the Black Sea Fleet could be outclassed. The ship used the same main armament as the preceding Imperatritsa Mariya class, but was larger and more heavily armored. Imperator Nikolai I was launched in 1916, but construction was suspended on 24 October 1917. The Soviets considered completing her in 1923, but later rejected the idea. She was towed to Sevastopol in 1927 and scrapped.
HSwMS Garmer was a small river monitor built for the Swedish Royal Skerry Artillery in the mid-1860s. She was designed to operate on the Swedish canals and lakes as well as in the shallow waters of the coast. The ship's captain had to steer the ship as well as aim and fire her gun. Garmer was sold for scrap in 1893.
The John Ericsson-class monitors were a group of five iron-hulled monitors; four were built for the Royal Swedish Navy and one for the Royal Norwegian Navy in the mid to late 1860s. They were designed under the supervision of the Swedish-born inventor, John Ericsson, and built in Sweden. Generally, the monitors were kept in reserve for the majority of the year and were only commissioned for several during the year. The ships made one foreign visit to Russia in 1867 but remained in Swedish or Norwegian waters for the rest of their careers. Two of the monitors, Thordon and Mjølner, ran aground, but were salvaged and repaired. Most of the monitors were reconstructed between 1892 and 1905 with more modern guns, but one was scrapped instead as it was not thought cost-effective to rebuild such an old ship. The surviving ships were mobilized during World War I and sold for scrap afterwards.
HSwMS John Ericsson was the lead ship of the John Ericsson-class monitors built for the Royal Swedish Navy in the mid-1860s. She was designed under the supervision of the Swedish-born inventor, John Ericsson, and built in Sweden. John Ericsson made one foreign visit to Russia in 1867, but remained in Swedish or Norwegian waters for the rest of her career. The ship was reconstructed between 1892 and 1895, but generally remained in reserve. She was mobilized during World War I and sold in 1919 for conversion to a barge.
HSwMS Thordön was the second ship of the John Ericsson-class monitors built for the Royal Swedish Navy in the mid-1860s. She was designed under the supervision of the Swedish-born inventor, John Ericsson, and built in Sweden. Thordön made one foreign visit to Russia in 1867, but remained in Swedish or Norwegian waters for the rest of her career. The ship was reconstructed between 1903 and 1905, but generally remained in reserve. She was mobilized during World War I, and sold in 1922 for conversion to a barge.
HSwMS Loke was the fourth, and last, ship of the John Ericsson-class monitors built for the Royal Swedish Navy in the late-1860s. Completed in 1871 she only made seven short cruises before she was permanently placed in reserve in late 1880. Funds were requested to reconstruct her in line with the other monitors, but were denied. She was listed for sale in 1908, but nothing is known of her fate.
HNoMS Mjølner, named after the hammer of the god Thor, was the fourth of five ships of the John Ericsson-class monitors built for the Royal Swedish Navy and the Royal Norwegian Navy in the mid-1860s. Influenced by the use of ironclads during the American Civil War, the design was based on that of USS Monitor. They were designed under the supervision of the Swedish-born inventor John Ericsson—coincidentally designer of Monitor—and built in Sweden. Mjølner was delivered in 1868. She ran aground the following year, without serious damage, and reconstructed in 1897 with later breech-loading guns. Mjølner was sold for scrap in 1909.
HSwMS Folke was the last of the seven Hildur-class monitors built for the Swedish Navy in the mid-1870s. Unlike her sisters, her gun turret was fixed to the rear. The ship was placed in reserve in 1919 and ultimately sold in 1942.
HSwMS Sköld was a small river monitor built for the Swedish Royal Skerry Artillery in the late 1860s. She was equipped with a dual propulsion system, both hand and steam-driven, although the hand-driven portion was removed early in the ship's career due to complaints from the crew. The ship was put into reserve in 1890 and used as a gunnery target in 1907.
HDMS Niels Juel was a training ship built for the Royal Danish Navy between 1914 and 1923. Originally designed before World War I as a monitor, construction was slowed by the war and she was redesigned as a training cruiser. Completed in 1923 she made training cruises to the Black and Mediterranean Seas, South America and numerous shorter visits to ports in northern Europe. The ship often served as a flagship and occasionally was used as a royal yacht for visits to overseas possessions and other countries.
The Hildur-class monitors consisted of seven monitors built for the Swedish Navy in the 1870s. They were sold in 1919 and most were converted into fuel oil barges. One such ship, HSwMS Sölve, has been converted into a museum ship.
HSwMS Berserk was one of seven Hildur-class monitors monitors built for the Swedish Navy in the mid-1870s. The ship had an uneventful career and was sold in 1919 for conversion into a fuel oil barge.
Sweden 
