Britain's failed amphibious assault on Cádiz in 1797 demonstrated the limits of naval power against a fortified harbour defended by shore batteries and gunboats.
Key Facts
- Operation duration
- June to July 1797
- Blockade duration
- 1797 to 1802
- British commander
- Lord Jervis and Rear Admiral Horatio Nelson
- Spanish commander
- Admiral Jose Mazarredo
- Outcome
- British withdrawal; siege lifted by early July 1797
By the Numbers
Location
Cause → Event → Consequence
Following the Battle of Cape Saint Vincent in February 1797, the British fleet under Lord Jervis and Horatio Nelson moved into the Gulf of Cádiz with the aim of forcing the Spanish fleet out of harbour. Nelson sought to neutralise Spanish naval power by compelling Admiral Mazarredo to engage in open battle rather than remain sheltered in port.
From June to July 1797, the Royal Navy bombarded Cádiz, causing limited damage to Spanish batteries, the navy, and the city itself. A series of amphibious assaults led by Rear Admiral Nelson failed in the face of Spanish gunboats and shore batteries constructed to defend the harbour entrance, subjecting British ships to sustained fire.
By early July 1797, British forces withdrew and the siege was lifted, having failed to draw the Spanish fleet into open water. The Royal Navy nonetheless maintained a naval blockade of Cádiz that continued until 1802, prolonging pressure on Spanish maritime activity without achieving the decisive naval engagement Nelson had sought.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Lord Jervis, Rear Admiral Horatio Nelson.
Side B
1 belligerent
Admiral Jose Mazarredo.