Action of 9 August 1780

The action of 9 August 1780 was a naval engagement of the American Revolutionary War, in which a Spanish fleet, led by Admiral Luis de Córdova y Córdova, along with a squadron of French ships, encountered a large British convoy. The Spanish and French force captured almost all the merchant vessels in the convoy, which dealt a severe blow to the commerce of Great Britain.

Action of 9 August 1780
Part of the American Revolutionary War

The British convoy of 63 merchant ships with all but 8 ships captured by the fleet under Luis de Cordova, Unknown author
Date9 August 1780
Location35°50′1″N 13°14′0″W
Result Franco-Spanish victory
Belligerents
Spain
 France
 Great Britain
Commanders and leaders
Luis Córdova
Jose Mazarredo
Antoine Beausset
John Moutray
Strength
32 ships of the line
6 frigates
1 ship of the line
2 frigates
63 merchantmen
Casualties and losses
None 3,144 prisoners
55 merchantmen captured

The British convoy, escorted by HMS Ramillies (74 guns, under Captain Sir John Moutray) and two frigates - Thetis (36 guns) and Southampton (36 guns), sailed from Portsmouth on 27 July. On 9 August, they encountered the Spanish fleet.

The Franco-Spanish fleet captured 55 of the 63 merchant vessels present, making it one of the most complete naval captures ever made. The losses, were, in total 80,000 muskets, equipment for 40,000 troops, 294 cannons, and 3,144 men. The financial impact of the losses were estimated to be around £1,500,000 (£1,000,000 in gold and £500,000 – £600,000 in equipment and ships). The action also helped to derail a secret British diplomatic effort to make peace with Spain. The loss was still remembered in Great Britain (by then the United Kingdom) 30 years later, at the height of the Napoleonic Wars.

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