A British blockade squadron captured the French ship Raisonnable, disrupting French efforts to reinforce the besieged garrison at Louisbourg.
Key Facts
- Date
- 29 April 1758
- Theater
- Bay of Biscay, near Brest
- British flagship
- HMS Dorsetshire
- French ship captured
- Raisonnable (ship of the line)
- French commander
- Louis-Armand-Constantin de Rohan
- British commander
- Captain Peter Denis (HMS Dorsetshire)
Location
Cause → Event → Consequence
France sought to relieve its garrison at Louisbourg, which faced an imminent British siege. In spring 1758, the French Atlantic Fleet dispatched multiple squadrons and individual ships from Brest to reinforce the fortress. The Royal Navy responded by maintaining a close blockade of Brest to intercept any departing French vessels.
A British squadron including HMS Intrepid, HMS Dorsetshire, and HMS Achilles was patrolling the French Biscay coast when a lone sail was spotted to the southwest. HMS Dorsetshire, under Captain Peter Denis, investigated and identified the vessel as the French ship of the line Raisonnable. In the ensuing battle, Dorsetshire inflicted heavy casualties on the French ship and compelled her captain to surrender.
The capture of Raisonnable prevented the vessel from reaching Louisbourg, further weakening French capacity to resist the British siege of that fortress. The engagement demonstrated the effectiveness of Britain's close blockade strategy in severing French Atlantic reinforcement routes during the Seven Years' War.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Captain Peter Denis.
Side B
1 belligerent
Louis-Armand-Constantin de Rohan.