HSwMS Sjölejonet was the lead ship of a class of nine naval submarines in the service of the Swedish Navy from just before World War II into the early Cold War. The submarines were ordered in response to the rising German threat to the south in the interwar period. Sjölejonet remained in service until 1959 and was sold for scrap in 1962.
The Svetlana-class cruiser was the first class of light cruisers built for the Imperial Russian Navy (IRN) during the 1910s. Construction was interrupted by World War I, the Russian Revolution and the Russian Civil War. Only Svetlana of the quartet was completed by the Soviet Union as a cruiser, two were converted to oil tankers, and the remaining ship was scrapped without being completed.
Gangut was both the lead ship of the Gangut-class dreadnoughts of the Imperial Russian Navy built before World War I and the last of her class to be completed. She was named after the Russian victory over the Swedish Navy in the Battle of Gangut in 1714. She was completed during the winter of 1914–1915, but was not ready for combat until mid-1915. Her role was to defend the mouth of the Gulf of Finland against the Germans, who never tried to enter, so she spent her time training and providing cover for minelaying operations. Her crew joined the general mutiny of the Baltic Fleet after the February Revolution and joined the Bolsheviks in 1918. She was laid up in 1918 for lack of manpower and not recommissioned until 1925, by which time she had been renamed Oktyabrskaya Revolutsiya.
Boyarin was a protected cruiser built for the Imperial Russian Navy by Burmeister & Wain in Copenhagen, Denmark. She served in the Russian Pacific Fleet and was sunk by a Russian naval mine near the entrance to Port Arthur, Manchuria, just after the start of the Russo-Japanese War in 1904.
Klas Horn was originally the Kazarski-class torpedo gunboat Posadnik of the Imperial Russian Navy. One of three built for the Russian Baltic Fleet, Posednik was used as a despatch vessel during World War I. During the Russian Revolution, Finland declared independence from the Russian Empire and the ship, which lay abandoned in Finnish waters, was taken over by the newly formed Finnish Navy and renamed Klas Horn, after a 16th-century admiral. Klas Horn ended her Finnish Navy service in the 1930s. The ship was broken up for scrap in 1938.
The Orfey-class destroyers were built for the Baltic Fleet of the Imperial Russian Navy. They were modified versions of the earlier destroyer Novik and the Derzky-class destroyers. These ships were larger, had triple torpedo tubes and an extra 102 mm (4 in) gun. One ship, Engels, was fitted with a 305 mm (12 in) recoilless rifle for testing in 1934. Fourteen ships were completed in 1914–1917 and fought in World War I and during the Allied intervention in the Russian Civil War. The survivors fought in World War II.
The Fidonisy class, also known as the Kerch class, were a group of eight destroyers built for the Black Sea Fleet of the Imperial Russian Navy during World War I. They participated in World War I, the Russian Civil War, and World War II.
The Hurja-class motor torpedo boats or H class was an Italian-designed class of Finnish motor torpedo boats, seeing service with the Finnish Navy during World War II. The five boats of the H class were built by Cantieri Baglietto in Genoa, Italy. The ships were converted into patrol boats in 1949, in accordance with the Paris peace treaty and their torpedo armament, forbidden by the treaty, was removed. The H class were stricken from the naval vessel register in 1963.
The Jymy-class motor torpedo boats or J class was an Italian-designed and built class of motor torpedo boats, seeing service during World War II with the Royal Italian Navy and later with the Finnish Navy. The four boats of the J class were built by Cantieri Baglietto in Genoa, Italy and purchased by the Finns on 5 June 1943. Following World War II, the vessels were rearmed according to the Paris Peace Treaty of 1947, losing their torpedo capabilities and given more guns. They were removed from service in 1961.
The Taisto-class motor torpedo boats or T class was a series of motor torpedo boats, which saw service with the Finnish Navy during World War II. Following the war, the Paris Peace Treaty of 1947 prohibited the Finnish Navy from employing torpedo-carrying vessels of any kind and the Taisto class were converted into motor gunboats. By 1964, all vessels of the class had been removed from service.
The Marcílio Dias-class destroyers were three destroyers of the Brazilian Navy that served during World War II. They were based on the United States Navy's Mahan class. They entered service in 1943 and served on Atlantic convoy duty with the Allies. In July 1944, the three destroyers escorted the Brazilian Expeditionary Force to Italy. Following the end of the war, the destroyers remained in service, undergoing modernisation. Two were discarded in 1966, with the last taken out of service in 1973.
Admiral Kornilov was a protected cruiser of the Russian Imperial Navy. She was presumably named for Admiral Vladimir Alexeyevich Kornilov.
The Douwe Aukes class were two minelayers of the Royal Netherlands Navy. The two ships were built at the Gusto shipyard in Schiedam. Construction began in 1919 and was completed in 1922. Built to serve in the Dutch territorial waters, both ships were still in service during the Second World War and they both escaped to the United Kingdom, HNLMS Douwe Aukes on 14 May and HNLMS Van Meerlant on 18 May 1940. Both vessels were transferred to the British Royal Navy. Van Meerlant was sunk by a mine in 1942 while in British service. Douwe Aukes was returned to the Royal Netherlands Navy following the war and was used as a depot ship until sold for scrap in 1962.
The Churruca class was a Spanish destroyer class built for the Spanish Navy based on a British design. Eighteen ships were built, with two being sold to Argentina and commonly referred to as the Cervantes class. The last two members of the class are sometimes referred to as a separate class, the Alava class.
The Ruotsinsalmi-class minelayers were a two-strong class of minelayers in the Finnish Navy. The two ships, comprising Ruotsinsalmi and Riilahti, were constructed in Finland and saw service in the Winter War and World War II. Riihahti was sunk in an engagement with Soviet motor torpedo boats on 23 August 1943. Ruotsinsalmi survived the wars and remained in service in the post war Finnish Navy until being withdrawn in the 1970s.
The Pallada-class cruisers were a group of three protected cruisers built for the Imperial Russian Navy (IRN) in the late 1890s. One ship of the class, Aurora, is still crewed by the Russian Navy, and maintained as a museum ship.
The Uragan-class guard ships were built for the Soviet Navy as small patrol and escort ships. Eighteen were built in the 1930s and served during World War II in all four of the Soviet Fleets: Baltic, Black Sea, Northern and Pacific. Four were lost during the war and the rest remained in service until the late 1950s in various secondary roles. The official Soviet designation was Project 2, Project 4 and Project 39, but they were nicknamed the "Bad Weather Flotilla" by Soviet sailors by virtue of their meteorological names.
The Mendoza class were a series of three destroyers built in the United Kingdom for the Argentine Navy in the 1920s. They were the first part of the Argentine re-armament programme of the 1920s. Construction began in 1927 and all three were commissioned in 1929. All three destroyers were converted to anti-aircraft escorts in 1958 and remained in service until 1962 when they were discarded.
Sokol was the first torpedo boat destroyer built for the Imperial Russian Navy. She was designed and built by the British shipbuilder Yarrows from 1894 to 1895 and was claimed to be the fastest warship in the world during her sea trials. She was renamed Pruitki in 1902.
Leytenant Shestakov was a destroyer of the Imperial Russian Navy and the name ship of her class. The ship was built by the Naval Yard, Nikolayev from 1906 to 1909, being launched on 28 July 1908. The ship served in the Russian Black Sea Fleet during the First World War, passing to control of the Bolsheviks following the October Revolution but was scuttled on 18 June 1918 to avoid capture by German troops.
Russia 
Finland