Commerce raiding is a form of

naval warfare Naval warfare is combat in and on the sea, the ocean, or any other battlespace involving a major body of water such as a large lake or wide river. The Military, armed forces branch designated for naval warfare is a navy. Naval operations can be ...

used to destroy or disrupt logistics of the enemy on the open sea by attacking its merchant shipping, rather than engaging its

combatants Combatant is the legal status of a person entitled to directly participate in hostilities during an armed conflict, and may be intentionally targeted by an adverse party for their participation in the armed conflict. Combatants are not afforded i ...

or enforcing a

blockade A blockade is the act of actively preventing a country or region from receiving or sending out food, supplies, weapons, or communications, and sometimes people, by military force. A blockade differs from an embargo or sanction, which are ...

against them.

Privateering A privateer is a private person or vessel which engages in commerce raiding under a commission of war. Since Piracy, robbery under arms was a common aspect of seaborne trade, until the early 19th century all merchant ships carried arms. A sover ...

is a form of commerce raiding conducted by independent operators.

Privateering

The first sort of commerce raiding was for nations to commission

privateer A privateer is a private person or vessel which engages in commerce raiding under a commission of war. Since robbery under arms was a common aspect of seaborne trade, until the early 19th century all merchant ships carried arms. A sovereign o ...

s. Early instances of this type of warfare were by the English and Dutch against the

Spanish treasure fleet The Spanish treasure fleet, or West Indies Fleet (, also called silver fleet or plate fleet; from the meaning "silver"), was a convoy system of sea routes organized by the Spanish Empire from 1566 to 1790, which linked Spain with its Spanish Empi ...

s of the 16th century, which resulted in financial gain for both captain and crew upon capture of enemy vessels (" prizes").

17th and 18th centuries

Privateers A privateer is a private person or vessel which engages in commerce raiding under a commission of war. Since robbery under arms was a common aspect of seaborne trade, until the early 19th century all merchant ships carried arms. A sovereign o ...

formed a large part of the total military force at sea during the 17th and 18th centuries. In the

First Anglo-Dutch War The First Anglo-Dutch War, or First Dutch War, was a naval conflict between the Commonwealth of England and the Dutch Republic. Largely caused by disputes over trade, it began with English attacks on Dutch merchant shipping, but expanded to vast ...

, English privateers attacked the trade on which the United Provinces entirely depended, capturing over 1,000 Dutch merchant ships. During the subsequent war with Spain, Spanish and Flemish privateers in the service of the Spanish Crown, including the notorious Dunkirkers, captured 1,500 English

merchant ship A merchant ship, merchant vessel, trading vessel, or merchantman is a watercraft that transports cargo or carries passengers for hire. This is in contrast to pleasure craft, which are used for personal recreation, and naval ships, which are ...

s, which provided a major boost to the flagging Dutch trade. Dutch privateers and others also attacked English trade, whether coastal, Atlantic, or Mediterranean, in the Second and Third Anglo-Dutch wars. During the

Nine Years' War The Nine Years' War was a European great power conflict from 1688 to 1697 between Kingdom of France, France and the Grand Alliance (League of Augsburg), Grand Alliance. Although largely concentrated in Europe, fighting spread to colonial poss ...

, French policy strongly encouraged privateers, including the famous

Jean Bart Jean Bart (; ; 21 October 1650 – 27 April 1702) was a Flemish naval commander and privateer. Early life Jean Bart was born in Dunkirk in 1650 to a seafaring family, the son of Jean-Cornil Bart (c. 1619–1668) who has been described various ...

, to attack English and Dutch shipping. England lost roughly 4,000 merchant ships during the war.Privateering and the Private Production of Naval Power
by Gary M. Anderson and Adam Gifford Jr. In the following War of Spanish Succession, privateer attacks continued, Britain losing 3,250 merchant ships. Parliament passed an updated Cruisers and Convoys Act in 1708, allocating regular warships to the defence of trade. In the

War of Austrian Succession The War of the Austrian Succession was a European conflict fought between 1740 and 1748, primarily in Central Europe, the Austrian Netherlands, Italy, the Atlantic Ocean and Mediterranean Sea. Related conflicts include King George's War in Nort ...

, the Royal Navy was able to concentrate more on defending British ships. Britain lost 3,238 merchantmen, a smaller fraction of her merchant marine than the enemy losses of 3,434. While French losses were proportionally severe, the smaller but better-protected Spanish trade suffered the least, and Spanish privateers enjoyed much of the best plunder of enemy merchantmen, particularly in the West Indies.

Napoleonic Wars

During

Britain Britain most often refers to: * Great Britain, a large island comprising the countries of England, Scotland and Wales * The United Kingdom of Great Britain and Northern Ireland, a sovereign state in Europe comprising Great Britain and the north-eas ...

's wars against

Revolutionary A revolutionary is a person who either participates in, or advocates for, a revolution. The term ''revolutionary'' can also be used as an adjective to describe something producing a major and sudden impact on society. Definition The term—bot ...

and

Napoleonic France The First French Empire or French Empire (; ), also known as Napoleonic France, was the empire ruled by Napoleon Bonaparte, who established French hegemony over much of continental Europe at the beginning of the 19th century. It lasted from ...

, the

Royal Navy The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...

dominated the seas. France adopted a ''guerre de course'' strategy by licensing civilian

s to seize British shipping. British

East Indiamen East Indiamen were merchant ships that operated under charter or licence for European Trading company, trading companies which traded with the East Indies between the 17th and 19th centuries. The term was commonly used to refer to vessels belon ...

of the time were therefore heavily armed to protect themselves against such raids, at the cost of considerable speed and maneuverability. Some East Indiamen, such as , were successfully able to fend off these attacks in other parts of the world; others, such as when ''Kent'' met ''Confiance'' in 1800, were less fortunate. U.S. and British privateers also actively raided each other's shipping during the

War of 1812 The War of 1812 was fought by the United States and its allies against the United Kingdom of Great Britain and Ireland, United Kingdom and its allies in North America. It began when the United States United States declaration of war on the Uni ...

American Civil War

During the

American Civil War The American Civil War (April 12, 1861May 26, 1865; also known by Names of the American Civil War, other names) was a civil war in the United States between the Union (American Civil War), Union ("the North") and the Confederate States of A ...

, the

Confederate Navy The Confederate States Navy (CSN) was the Navy, naval branch of the Confederate States Armed Forces, established by an act of the Confederate States Congress on February 21, 1861. It was responsible for Confederate naval operations during the Amer ...

operated a fleet of commissioned Confederate States Navy commerce raiders. These differed from

s as they were state-owned ships with orders to destroy enemy commerce rather than privately owned ships with

letters of marque A letter of marque and reprisal () was a government license in the Age of Sail that authorized a private person, known as a privateer or corsair, to attack and capture vessels of a foreign state at war with the issuer, licensing internationa ...

Steel navies

By the 1880s, the navies of Europe began to deploy warships made of iron and steel. The natural evolution that followed was the installation of more powerful guns to penetrate such warships, followed by specialized armor plating, followed by larger guns and the development of effective torpedoes (followed by armored belts below the waterline to protect against them). This "arms spiral" (which included the development of

high explosive An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. An exp ...

and

armor-piercing Armour-piercing ammunition (AP) is a type of projectile designed to penetrate armour protection, most often including naval armour, body armour, and vehicle armour. The first, major application of armour-piercing projectiles was to defeat the ...

shells) shifted focus from capture of "prizes" (that meant financial gain for captain and crew of the responsible vessel, and their government, when the prize and her cargo were

auction An auction is usually a process of Trade, buying and selling Good (economics), goods or Service (economics), services by offering them up for Bidding, bids, taking bids, and then selling the item to the highest bidder or buying the item from th ...

ed) to destruction of enemy

warships A warship or combatant ship is a naval ship that is used for naval warfare. Usually they belong to the navy branch of the armed forces of a nation, though they have also been operated by individuals, cooperatives and corporations. As well as ...

. First seen at the Sinope in 1853, the change was little appreciated until 1905, when at Tsushima seven

pre-dreadnought Pre-dreadnought battleships were sea-going battleships built from the mid- to late- 1880s to the early 1900s. Their designs were conceived before the appearance of in 1906 and their classification as "pre-dreadnought" is retrospectively appl ...

s were sent to the bottom, and the only prizes were those that had voluntarily surrendered.

World War I

World War I saw Germany conducting a commerce war ("''Handelskrieg''") against Britain and her allies, principally with U-boats, but also with

merchant raider Merchant raiders are armed commerce raiding ships that disguise themselves as non-combatant merchant vessels. History Germany used several merchant raiders early in World War I (1914–1918), and again early in World War II (1939–1945). The cap ...

s and

light cruiser A light cruiser is a type of small or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck. Prior to thi ...

s, and even occasionally with naval airships.

World War II

During World War II, the

Battle of the Atlantic The Battle of the Atlantic, the longest continuous military campaign in World War II, ran from 1939 to the defeat of Nazi Germany in 1945, covering a major part of the naval history of World War II. At its core was the Allies of World War II, ...

saw

Nazi Germany Nazi Germany, officially known as the German Reich and later the Greater German Reich, was the German Reich, German state between 1933 and 1945, when Adolf Hitler and the Nazi Party controlled the country, transforming it into a Totalit ...

conducting commerce raiding against Britain and its allies, again using U-boats, auxiliary cruisers, and small groups of cruisers and battleships (surface raiders). The goal was to wage a tonnage war against the British Empire, destroying merchant shipping (and its cargoes) faster than they could be replaced, ultimately strangling the island nation by cutting off supplies it was inevitably dependent upon. Limitations set by the

Treaty of Versailles The Treaty of Versailles was a peace treaty signed on 28 June 1919. As the most important treaty of World War I, it ended the state of war between Germany and most of the Allies of World War I, Allied Powers. It was signed in the Palace ...

meant Germany had been unable to build a large battle fleet between the World Wars as she had in the time leading up to World War I; instead, she chose to covertly develop her U-boat fleet.

Submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...

s were cheaper and quicker to build than capital ships. This meant Germany was not able to fight battles between fleets, and relied on commerce raiding instead. The extreme early success of ''

Kriegsmarine The (, ) was the navy of Nazi Germany from 1935 to 1945. It superseded the Imperial German Navy of the German Empire (1871–1918) and the inter-war (1919–1935) of the Weimar Republic. The was one of three official military branch, branche ...

'' U-boat wolfpacks led to the Allied development of an extensive and naval resource-straining convoy system. In addition to U-boats Germany also deployed the small numbers of surface warships she possessed, such as the " pocket battleships", her auxiliary cruisers, and a number of commercial vessels converted into merchant raiders, perhaps the most famous being . During World War II, elements of the

United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...

based in Brazil conducted operations in the Atlantic against German commerce raiders and

blockade runner A blockade runner is a merchant vessel used for evading a naval blockade of a port or strait. It is usually light and fast, using stealth and speed rather than confronting the blockaders in order to break the blockade. Blockade runners usua ...

s. In the Pacific, the U.S. Navy operated against Japanese merchant shipping, as well as engaging in offensive operations against ships of the Japanese Imperial Navy. The bulk of the Japanese merchant marine was sunk by American submarines. By the end of the war, only 12% of Japan's pre-war merchant tonnage was still afloat. The Indian Ocean raid was a naval sortie by the Carrier Striking Task Force of the Japanese Navy from 31 March to 10 April 1942 against Allied shipping and bases in the

Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or approximately 20% of the water area of Earth#Surface, Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia (continent), ...

. It was an early engagement of the Pacific campaign of World War II. The staff of the Imperial Japanese Navy decided to send some raiders to

waters during December 12, 1941 – July 12, 1942. The Germans had already been operating in the area and conducted mutual aid with Japanese submarines, in the form of re-supply and military intelligence. The Indian Ocean was the largest operating area involving direct contact between the two Axis partners, in which their primary objective was to keep pressure on the shipping lanes. The Japanese Navy participated in some commerce raiding, but concentrated its efforts toward a "decisive battle" in the Pacific, which never took place.

Notes

References

* * Lehmann, Ernst A.; Mingos, Howard. ''The Zeppelins: The Development of the Airship, with the Story of the Zepplin Air Raids in the World War''. *