February
- SMS Kaiser Friedrich III (
Imperial German Navy): Decommissioned in February 1915 and sold for scrap in 1920 [1] [2] [3]
The list of ship decommissionings in 1915 includes a chronological list of all ships decommissioned in 1915.
Imperial German Navy): Decommissioned in February 1915 and sold for scrap in 1920 [1] [2] [3] 
HMS Castor was one of the Cambrian subclass of the C class of light cruisers. She saw service during the First World War and the Russian Civil War.
The Chapayev class were a group of cruisers built for the Soviet Navy during and after World War II. Seventeen ships were planned in total, but only seven were actually started before the German invasion. Two incomplete ships were destroyed when their building yard in Nikolaev was captured by Nazi Germany and the remaining five cruisers were completed only in 1950, with the last ship serving until 1981.
HMS Ossory was an Admiralty M-class destroyer built for the Royal Navy during the First World War. She took part in the Battle of Jutland in 1916 and was sold for scrap in 1921.
The Kaiser Friedrich III class consisted of five pre-dreadnought battleships of the Imperial German Navy; all ships of the class were named for German emperors. The ships were Kaiser Friedrich III, Kaiser Wilhelm II, Kaiser Wilhelm der Grosse, Kaiser Barbarossa, and Kaiser Karl der Grosse, all built between 1895 and 1901. The class saw the introduction of the traditional armament layout for German battleships prior to the advent of the dreadnought type of battleship in the early 1900s: four large-caliber guns, but of comparatively smaller size compared to their contemporaries, in two gun turrets. The German adoption of smaller guns was a result of a preference for higher volumes of fire over weight of shell. The Kaiser Friedrich III class also standardized the use of three screws for battleships and introduced water-tube boilers and Krupp cemented armor.
SMS Kaiser Friedrich III was the lead ship of the Kaiser Friedrich III class of pre-dreadnought battleships. She was laid down at the Kaiserliche Werft in Wilhelmshaven in March 1895, launched in July 1896, and finished in October 1898. The ship was armed with a main battery of four 24-centimeter (9.4 in) guns in two twin gun turrets supported by a secondary battery of eighteen 15 cm (5.9 in) guns.
SMS Kaiser Barbarossa was a German pre-dreadnought battleship of the Kaiser Friedrich III class. The ship was built for the Imperial Navy, which had begun a program of expansion at the direction of Kaiser Wilhelm II. Construction took place at Schichau, in Danzig. Kaiser Barbarossa was laid down in August 1898, launched on 21 April 1900, and commissioned in June 1901. The ship was armed with a main battery of four 24-centimeter (9.4 in) guns in two twin-gun turrets.
HMS Marshal Soult was a Royal Navy Marshal Ney-class monitor constructed in the opening years of the First World War. Laid down as M14, she was named after the French general of the Napoleonic Wars Marshal Jean-de-Dieu Soult. She served in both World Wars and was decommissioned in 1946.
HMS Havelock was an Abercrombie-class monitor of the Royal Navy that saw service in the First World War.
HMS Roberts was an Abercrombie-class monitor of the Royal Navy that served in the First World War.
SM U-17 was a German submarine during World War I. U-17 sank the first British merchant vessel in the First World War, and also sank another ten ships, damaged one ship and captured two ships, surviving the war without casualty.
The Durandal class was a group of four destroyers built for the French Navy between 1896 and 1900, used during the First World War. These vessels were France's first true destroyers rather than torpedo boats. Two units were launched in 1899 while another two followed in 1900. Another four destroyers of the similar Samsun class were laid down in 1906 and completed in 1907 for the Ottoman Navy, they also served in the First World War.
The Bremen class was a group of seven light cruisers built for the Imperial German Navy in the early 1900s. The seven ships, Bremen, Hamburg, Berlin, Lübeck, München, Leipzig, and Danzig, were an improvement upon the previous Gazelle class. They were significantly larger than the earlier class, and were faster and better armored. Like the Gazelles, they were armed with a main battery of ten 10.5 cm SK L/40 guns and a pair of torpedo tubes.
SMS Heimdall was the fourth vessel of the six-member Siegfried class of coastal defense ships built for the German Imperial Navy. Her sister ships were Siegfried, Beowulf, Frithjof, Hildebrand, and Hagen. Heimdall was built by the Kaiserliche Werft in Wilhelmshaven between 1891 and 1894, and was armed with a main battery of three 24-centimeter (9.4 in) guns. She served in the German fleet throughout the 1890s and was rebuilt in 1900–1902. She served in the VI Battle Squadron after the outbreak of World War I in August 1914, but saw no action. Heimdall was demobilized in 1915 and used as a barracks ship thereafter. She was ultimately broken up for scrap in 1921.
SMS Kaiser Karl VI was the second of three armored cruisers built by the Austro-Hungarian Navy. She was built by the Stabilimento Tecnico Triestino in Trieste between June 1896 and May 1900, when she was commissioned into the fleet. Kaiser Karl VI represented a significant improvement over the preceding design—Kaiserin und Königin Maria Theresia—being faster and more heavily armed and armored. She provided the basis for the third design, Sankt Georg, which featured further incremental improvements. Having no overseas colonies to patrol, Austria-Hungary built the ship solely to reinforce its battle fleet.
HMS Viceroy (D91) was a W-class destroyer of the British Royal Navy that saw service in the final months of World War I and in World War II.
Several ships of the Swedish Navy have been named HSwMS Tordön or HSwMS Thordön, named after the Old Norse word for thunder:
HMS Maenad was an Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the previous L class, capable of higher speed. The vessel, launched in 1915, served in the Battle of Jutland in 1916, attacking both battleships and destroyers of the German High Seas Fleet. However, the vessel was notorious for undertaking a sharp manoeuvre which obstructed other destroyers in the fleet from attacking. Maenad also undertook anti-submarine patrols. In 1917, the ship mistakenly attacked the British submarine G12 thinking it was a German boat. The submarine escaped with damages. After the armistice that ended of the war, Maenad was placed in reserve until being sold to be broken up in Germany in 1921.
HMS Paladin was a Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the previous L-class destroyer, capable of higher speed. Launched on 27 March 1916. Paladin took part in the Royal Navy sorties against German minesweepers in 1917, which culminated in the Second Battle of Heligoland Bight on 17 November, although the destroyer did not engage with any enemy warships during the battle. After the end of the war, the ship was placed in reserve before being decommissioned and sold to be broken up on 9 May 1921.
HMS Pigeon was an Admiralty M-class destroyer which served with the Royal Navy during the First World War. The M class were an improvement on the previous L-class destroyer, capable of higher speed. Launched on 3 March 1916 by Hawthorn Leslie on the River Tyne, the vessel served as part of the Grand Fleet. Pigeon was mainly involved in escorting convoys. After an unsuccessful sortie in October 1917 against German cruisers, the destroyer moved to anti-submarine warfare. In this arena, Pigeon had some success in 1918, rescuing the survivors from the sinking troopship Tuscania in February and assisting in the destruction of the German U-boat UB-124 in July. After the Armistice, the destroyer was redeployed to serve as part of the Nore Local Defence flotilla until being decommissioned and sold to be broken up on 9 May 1921.