An armed merchantman is a merchant ship equipped with guns, usually for defensive purposes, either by design or after the fact. In the days of sail, piracy and privateers, many merchantmen would be routinely armed, especially those engaging in long distance and high value trade. In more modern times, auxiliary cruisers were used offensively as merchant raiders to disrupt trade chiefly during both World War I and World War II, particularly by Germany.
HMS Enterprise was one of two Emerald-class light cruisers built for the Royal Navy. She was built by John Brown & Company, with the keel being laid down on 28 June 1918. She was launched on 23 December 1919, and commissioned on 7 April 1926. She was the 14th ship to serve with the Royal Navy to carry the name Enterprise, a name which is still used in the Royal Navy today.
HMS Hereward, named after Hereward the Wake, was an H-class destroyer built for the Royal Navy in the mid-1930s. She was assigned to the Mediterranean Fleet before and the ship spent four months during the Spanish Civil War in mid-1937 in Spanish waters, enforcing the arms blockade imposed by Britain and France on both sides of the conflict. When the Second World War began in September 1939, the ship was in the Mediterranean, but was shortly transferred to the South Atlantic to hunt for German commerce raiders and blockade runners, capturing one of the latter in November. Hereward was transferred to the Home Fleet in May 1940 and rescued Queen Wilhelmina of the Netherlands after the Germans had invaded.
HMS Glasgow was a Town-class cruiser commissioned in September 1937. She took part in the Fleet Air Arm raid that crippled the Italian Fleet at Taranto in 1940. She had the unfortunate experience of sinking two Allied ships during her wartime service, once through accidental collision and the other by gunfire after a case of mistaken identity.
Commerce raiding is a form of naval warfare used to destroy or disrupt logistics of the enemy on the open sea by attacking its merchant shipping, rather than engaging its combatants or enforcing a blockade against them.
HMS Foresight was one of nine F-class destroyers built for the Royal Navy during the 1930s. She was assigned to the Home Fleet upon completion. Unlike her sister ships, she does not appear to have been attached to the Mediterranean Fleet in 1935–36 during the Abyssinia Crisis, nor did she enforce the arms blockade imposed by Britain and France on both sides of the conflict the Spanish Civil War of 1936–1939. The ship escorted the larger ships of the fleet during the early stages of World War II and played a minor role in the Norwegian Campaign of 1940. Foresight was sent to Gibraltar in mid-1940 and formed part of Force H where she participated in the attack on Mers-el-Kébir and the Battle of Dakar. The ship escorted numerous convoys to Malta in 1941 and Arctic convoys during 1942. Later that year, Foresight participated in Operation Pedestal, another convoy to Malta. She was torpedoed by an Italian aircraft on 12 August and had to be scuttled the next day.
HMS Bonaventure was the lead ship of the Dido-class light cruisers built for the Royal Navy (RN) during the 1930s and during the Second World War. Completed in 1940, Bonaventure was assigned to the Home Fleet and participated in Operation Fish, the evacuation of British wealth from the UK to Canada in July. The ship made one short patrol in August into the North Atlantic to search for German blockade runners and followed that up by escorting an aircraft carrier as it conducted air strikes in Southern Norway in September. The next month she was tasked to provide cover for anti-shipping raids off the Norwegian coast. Bonaventure participated in the unsuccessful search for the German commerce raider Admiral Scheer in November and sustained weather damage that caused her to spend time in a dockyard for repairs. She was part of the escort force for Convoy WS 5A in December and helped to drive off another German commerce raider. While searching for stragglers from the convoy, the cruiser sank a German blockade runner.
HMS Hyacinth was one of three Highflyer-class protected cruisers built for the Royal Navy in the 1890s. Initially assigned to the Channel Fleet, she spent much of her early career as flagship for the East Indies Station. She was reduced to reserve in 1912 after a lengthy refit before becoming the flagship of the Cape of Good Hope Station in 1913. After the beginning of World War I in August 1914, she spent the first few months of the war escorting convoys around South Africa. In early 1915, she was deployed to German East Africa to blockade the German light cruiser SMS Königsberg. She destroyed a German blockade runner attempting to bring supplies through the blockade in April and sank a German merchant vessel in early 1916. Hyacinth remained on the Cape Station for the rest of the war and was paid off in 1919, although she was not sold for scrap until 1923.
The Italian ship Ramb I was a pre-war "banana boat" converted to an auxiliary cruiser in World War II. Ramb I operated as an armed merchant in the Red Sea and was ordered to sail to Japan after the fall of Massawa to the Allies. She was sunk in the Indian Ocean before she could reach her intended destination.
HMS Delhi was a Danae-class cruiser that served with the Royal Navy through the Second World War, from the Caribbean to eastern China. She was laid down in 1917, launched in 1918 and commissioned for service in 1919, serving until decommissioning in mid-1945 due to extensive battle damage, and was to be scrapped in 1948 after lengthy war and peacetime service around the world.
The Action of 27 February 1941 was a single ship action between the British cruiser HMS Leander and the Italian ship Ramb I, an auxiliary cruiser. It began when Leander ordered an un-flagged freighter to stop for an inspection. The freighter raised the Italian colours and engaged Leander which sank Ramb I shortly after. About 150 members of the crew were killed and 100 were rescued and taken to Addu Atoll, thence to Ceylon. Leander patrolled southwards to investigate more reports of commerce raiders.
Mar Negro was an armed merchantman of the Nationalist Spanish Navy during the Spanish Civil War. The cargo ship was launched in 1930 along with her sister ship MV Mar Cantábrico, and after five years with the Compañía Marítima Del Nervión company, she was requisitioned by the Spanish Republican Navy in 1936. Captured by a group of Nationalist sympathizers from her crew off Algeria in 1937, she entered in service in 1938 after being converted to an auxiliary cruiser.
SMS Erzherzog Franz Ferdinand was an Austro-Hungarian Radetzky-class pre-dreadnought battleship commissioned into the Austro-Hungarian Navy on 5 June 1910. She was named after Archduke Franz Ferdinand. The first ship of her class to be built, she preceded Radetzky by more than six months. Her armament included four 30.5 cm (12 in) guns in two twin turrets, and eight 24 cm (9.4 in) guns in four twin turrets.
The action of 29 February 1916 was a naval engagement fought during the First World War between the United Kingdom and the German Empire. SMS Greif, a German commerce raider, broke out into the North Sea and Admiral Sir John Jellicoe dispatched Royal Navy warships to intercept the raider. Four British vessels intercepted the commerce raider Greif. The armed merchant cruiser RMS Alcantara and Greif fought a brief engagement before British reinforcements arrived when both were severely damaged, both being sunk.
Giovanni Bausan was a protected cruiser of the Italian Regia Marina that was designed and built by Sir W G Armstrong Mitchell & Co.'s Elswick Works in England in the mid-1880s. The finished ship entered service in May 1885. She was the first ship of this type to be built for the Italian fleet, and she provided the basis for subsequent designs built in Italy, including the Etna class. Giovanni Bausan was intended to serve as a "battleship destroyer", and was armed with a main battery of two 10-inch (254 mm) guns to give her the ability to defeat heavy armor, but design flaws rendered her unfit for this role.
Z24 was one of fifteen Type 1936A destroyers built for the Kriegsmarine during World War II. Completed in 1940, the ship spent the first half of the war in Norwegian waters. She was very active in attacking the Arctic convoys ferrying war materials to the Soviet Union in 1941–1942, but only helped to sink one Allied ship herself.
Piemonte was a unique protected cruiser built for the Italian Regia Marina in the 1880s by the British shipyard Armstrong Whitworth. She was the first major warship armed entirely with quick-firing (QF) guns and she was also the fastest cruiser in the world upon her completion in 1889. Piemonte was frequently deployed overseas, including a lengthy tour in East Asian waters from 1901 to 1904. She saw significant action during the Italo-Turkish War in 1911–1912 in the Red Sea, where she frequently bombarded Ottoman ports. During the Battle of Kunfuda Bay in January 1912, she and two destroyers sank four Ottoman gunboats and forced ashore three more. Piemonte participated in World War I but she saw little action during the conflict. She remained in service until 1920, when she was scrapped.
Elba was a protected cruiser of the Italian Regia Marina. She was the fifth of six Regioni-class ships, all of which were named for regions of Italy, with the exception of Elba, which was named for the island. Elba was built by the Regio Cantieri di Castellammare di Stabia shipyard; her keel was laid in September 1890, she was launched in August 1893, and she was commissioned in February 1896. The ship was equipped with a main armament of four 15 cm (5.9 in) and six 12 cm (4.7 in) guns, and she could steam at a speed of nearly 18 knots.
Puglia was a protected cruiser of the Italian Regia Marina. She was the last of six Regioni-class ships, all of which were named for regions of Italy. She was built in Taranto between October 1893 and May 1901, when she was commissioned into the fleet. The ship was equipped with a main armament of four 15 cm (5.9 in) and six 12 cm (4.7 in) guns, and she could steam at a speed of 20 knots.
Z37 was a Type 1936A (Mob) destroyer built for the Kriegsmarine during World War II. Completed in 1942, the ship spent most of her brief career deployed in France. She participated in the Battle of the Bay of Biscay at the end of 1943 before she was accidentally rammed by the destroyer Z32 in early 1944. Towed back to port, the Kriegsmarine decided that Z37 was too badly damaged to repair and disarmed her hulk. Decommissioned later that year, she was scuttled by her crew before being scrapped by the French in 1949.
Germany
