Action of 30 June 1798

A Representation of the Jason 38 guns, capturing the La Seine, John Fairburn, 1798, National Maritime Museum

Date	29–30 June 1798
Location	Bay of Biscay, Atlantic Ocean
Result	British victory

Belligerents

Great Britain

French Republic

Commanders and leaders

Captain Charles Stirling

Lieutenant Julien-Gabriel Bigot

Strength

Frigates HMS Jason, HMS Pique and HMS Mermaid

Frigate Seine

Casualties and losses

9 killed, 18 wounded
Pique wrecked

170 killed, 100 wounded
Seine captured

The Action of 30 June 1798 was a minor naval engagement fought along the Biscay coast of France during the French Revolutionary Wars. The French Navy had been largely driven from the Atlantic Ocean early in the war following heavy losses in a series of failed operations. This had allowed the Royal Navy's Channel Fleet to institute a close blockade on the French naval ports of the Biscay coast, particularly Brest in Brittany. The blockade strategy included a constantly patrolling inshore squadron composed of frigates, tasked with preventing the passage of French ships into or out of the port. In the spring of 1798, several French frigates stationed in the Indian Ocean were sent back to France as the base at Île de France could no longer supply them effectively. One of these ships was the 40-gun frigate Seine, which departed Port Louis laden with 280 soldiers from the garrison.

Seine had a rapid passage back to European waters, arriving in the Bay of Biscay on 28 June. Early the following morning, with the Brittany coast in sight, Seine was spotted by the inshore frigate squadron of HMS Jason, HMS Pique and HMS Mermaid. While Mermaid cut Seine off from the coast, Jason and Pique gave chase as Seine fled southwards. Pique reached Seine at 23:00 that evening and for more than two and a half hours the frigates pounded at one another until Pique fell back. Pique and Jason continued the chase full speed through the night, until suddenly all three frigates crashed headlong into the sandbanks off La Tranche-sur-Mer on the Vendée coast. Even while grounded the frigates continued to fire on one another until Mermaid finally arrived and the outnumbered Seine surrendered. Jason and Seine were badly damaged but successfully refloated, the casualties on the packed decks of the French ship appallingly high, but Pique was an irretrievable wreck: the ship was evacuated and then burnt before the remainder of the squadron returned to Britain with their prize.

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