The Assault on Cádiz was a part of a protracted naval blockade of the
Spanish port
A port is a maritime facility comprising one or more wharves or loading areas, where ships load and discharge cargo and passengers. Although usually situated on a sea coast or estuary, ports can also be found far inland, such as Hamburg, Manch ...
of
Cádiz
Cádiz ( , , ) is a city in Spain and the capital of the Province of Cádiz in the Autonomous communities of Spain, autonomous community of Andalusia. It is located in the southwest of the Iberian Peninsula off the Atlantic Ocean separated fr ...
by 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 ...
, which comprised the siege and the shelling of the city as well as an
amphibious assault
Amphibious warfare is a type of offensive military operation that today uses naval ships to project ground and air power onto a hostile or potentially hostile shore at a designated landing beach. Through history the operations were conducte ...
on the port itself from June to July 1797. After the battle of Cape
Saint Vincent the British fleet led by
Lord Jervis and Sir
Horatio Nelson
Horatio Nelson, 1st Viscount Nelson, 1st Duke of Bronte ( – 21 October 1805) was a Royal Navy officer whose leadership, grasp of strategy and unconventional tactics brought about a number of decisive British naval victories during the French ...
had appeared in the
Gulf of Cádiz
The Gulf of Cádiz (, ) is the arm of the Atlantic Ocean between Cabo de Santa Maria, the southernmost point of mainland Portugal; and Cape Trafalgar on the Spanish coast at the western end of the Strait of Gibraltar. Two major rivers, the Gu ...
. In the first days of June the city was bombarded, causing slight damage to the Spanish batteries, navy and city. Nelson's objective was to force the Spanish admiral Jose Mazarredo to leave the harbour with the Spanish fleet. The Spanish response was to build gunboats and small ships to protect the entrance of the harbour from the British. By early July, after a series of failed attacks led by
Rear Admiral
Rear admiral is a flag officer rank used by English-speaking navies. In most European navies, the equivalent rank is called counter admiral.
Rear admiral is usually immediately senior to commodore and immediately below vice admiral. It is ...
Nelson, and with the British ships taking huge fire from the Spanish forts and batteries, the British withdrew and the siege was lifted. The naval blockade, however, lasted until 1802.
Background
In February 1797, the British routed a Spanish fleet near
Cape St. Vincent but failed to strike a solid blow against the
Spanish Navy
The Spanish Navy, officially the Armada, is the Navy, maritime branch of the Spanish Armed Forces and one of the oldest active naval forces in the world. The Spanish Navy was responsible for a number of major historic achievements in navigation ...
in the uneven struggle.
Admiral
Admiral is one of the highest ranks in many navies. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army or the air force. Admiral is ranked above vice admiral and below admiral of ...
Sir
John Jervis sailed for
Lisbon
Lisbon ( ; ) is the capital and largest city of Portugal, with an estimated population of 567,131, as of 2023, within its administrative limits and 3,028,000 within the Lisbon Metropolitan Area, metropolis, as of 2025. Lisbon is mainlan ...
after the engagement, frustrated at the escape of several valuable prizes including . New orders from the
Admiralty demanded him to
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 ...
and subdue the Spanish port of
Cádiz
Cádiz ( , , ) is a city in Spain and the capital of the Province of Cádiz in the Autonomous communities of Spain, autonomous community of Andalusia. It is located in the southwest of the Iberian Peninsula off the Atlantic Ocean separated fr ...
, where much of the battered Spanish fleet had sought shelter. The
First Sea Lord
First Sea Lord, officially known as First Sea Lord and Chief of the Naval Staff (1SL/CNS), is the title of a statutory position in the British Armed Forces, held by an Admiral (Royal Navy), admiral or a General (United Kingdom), general of the ...
had ordered the assault as he believed that Jervis' victory over
José de Córdoba y Ramos guaranteed a successful attack on that strategic harbour.
Blockade begins
The blockade of Cádiz, which had been begun by Jervis in 1797, had no intermission from that time until the peace of Amiens, and on the renewal of the war it was recommenced with all its former rigour. The fleet was distant from the town about ; the Spanish fleet within the harbour, and the British in-shore squadron under the command of Rear Admiral
Thomas Louis
Rear-Admiral Sir Thomas Louis, 1st Baronet (''bap.'' 11 May 1758 – 17 May 1807) was a Royal Navy officer who served in the American Revolutionary War and French Revolutionary and Napoleonic Wars. He was one of Horatio Nelson's " Band of Broth ...
, closely watching their movements, and reporting every indication of their disposition to come to sea. Two frigates were at the mouth of the harbour, for the purpose of intercepting any supply of provisions for the enemy. Nelson said he knew no more certain means of bringing them out than starvation.
[Belton, the naval history of Great Britain p 57]
Having completed these arrangements, the admiral retired with the body of the fleet to the neighbourhood of Cape St. Mary's between west of Cádiz, establishing a line of communication between himself and his advanced squadron, by means of three or four intermediate ships. By keeping at this distance from Cádiz, Nelson prevented the enemy from acquiring any accurate knowledge of his force.
Battle

Nelson was appointed to the command of the inshore squadron blockading Cádiz. An order from Sir John Jervis directed the launches and barges of two divisions of the fleet to assemble on board , between 9 and 10 o'clock every night, armed with
carronade
A carronade is a short, smoothbore, cast-iron cannon which was used by the Royal Navy. It was first produced by the Carron Company, an ironworks in Falkirk, Scotland, and was used from the last quarter of the 18th century to the mid-19th cen ...
s, spikes, cutlasses, broad axes, and chopping knives, a lamp in each boat with spikes, a sledge-hammer, and a coil of small rope, to tow off any armed brig, mortar or gun-boat, that should be carrier, and to follow the directions of Nelson for the night.
The Spaniards had equipped a number of gun-boats and large launches, in which they rowed guard during the night, to prevent the near approach of the blockaders. On these a vigorous attack was made in the night of 3 July by the British boats, headed by Nelson himself, which pursued the Spaniards close to the walls of Cádiz, and took two mortar-boats and an armed launch. In this conflict it was the admiral's fortune to encounter the barge of Don Miguel Tregoyen, the commander of the Spanish gun-boats. The struggle that ensued was one of the most perilous in which Nelson had ever been engaged. He fought hand to hand with the Spanish commandant, and it was his own opinion that he must have lost his life but for the devoted attachment of his faithful coxswain, John Sykes.
The Spanish garrison of Cádiz at this time consisted of more than 4,000 men. On the line wall facing the bay were mounted 70 pieces of cannon and eight mortars; near the Alameda were four other mortars; and from the Capuchins, at the back of the city, to the land point were three batteries of four guns each. Such was the strength of the place when Nelson was ordered to bombard it. The first attempt proved ineffective, as the large mortar had been materially damaged in earlier service. The second produced considerable effect in the town and among the shipping, as ten sail of the line, among them the ships carrying the flags of admirals Mazarredo and Gravina, warped out of the range of the shells with much precipitation on the following morning.
On the night of 8 July, Nelson meditated another operation under his own immediate direction; but the wind blew so strong down the bay, that it was found impossible to bring up the
bomb vessel
A bomb vessel, bomb ship, bomb ketch, or simply bomb was a type of wooden sailing naval ship. Its primary armament was not cannons (Naval long gun, long guns or carronades) – although bomb vessels carried a few cannons for self-defence – but ...
s to the point of attack in time. On the following day, he informed Earl St. Vincent that, though he hoped enough had been done to force out the Spanish fleet, yet in case there had not, he would try them again.
The continuation of the blockade for most of the following three years, greatly curtailed the operations of the Spanish fleet from Cádiz until the
Peace of Amiens
The Treaty of Amiens (, ) temporarily ended hostilities between France, the Spanish Empire, and the United Kingdom at the end of the War of the Second Coalition. It marked the end of the French Revolutionary Wars; after a short peace it set t ...
in 1802, allowing the Royal Navy to establish its dominance in the Mediterranean.
Aftermath
Nelson had some time before he proposed to the commander-in-chief an
expedition against the town of Santa Cruz, in the island of
Tenerife
Tenerife ( ; ; formerly spelled ''Teneriffe'') is the largest and most populous island of the Canary Islands, an Autonomous communities of Spain, autonomous community of Spain. With a land area of and a population of 965,575 inhabitants as of A ...
. Lord Jervis allowed Sir Horatio to select such ships and officers as he thought proper for this service. The expedition resulted in another defeat for him.
The Spanish citizens of
Cádiz
Cádiz ( , , ) is a city in Spain and the capital of the Province of Cádiz in the Autonomous communities of Spain, autonomous community of Andalusia. It is located in the southwest of the Iberian Peninsula off the Atlantic Ocean separated fr ...
composed a song of the victory that became very popular in Spain during the 19th century:
:''¿De qué sirve a los ingleses''
:''tener fragatas ligeras''
:''si saben que Mazarredo''
:''tiene lanchas cañoneras?''
:''What good is for English''
:''having light frigates''
:''if they know that Mazarredo''
:''has gunboats?''
References
Bibliography
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*
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*
*
Fernández Duro, Cesáreo (1902). ''Armada española desde la unión de los reinos de Castilla y de León'', Vol. VI. Sucesores de Rivadeneyra, Madrid. (in Spanish)
*
*
Pelham Brenton, Edward (1837). '' The naval History of Great Britain, from the Year MDCCLXXXIII to MDCCCXXXVI Vol II.'' London.
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{{DEFAULTSORT:Assault On Cadiz (1797)
Cádiz
Cádiz ( , , ) is a city in Spain and the capital of the Province of Cádiz in the Autonomous communities of Spain, autonomous community of Andalusia. It is located in the southwest of the Iberian Peninsula off the Atlantic Ocean separated fr ...
1797 in Spain
Naval battles of the French Revolutionary Wars involving Great Britain
Naval battles of the French Revolutionary Wars involving Spain
Sieges involving Great Britain
Sieges of Cádiz