The Battle of the Îles Saint-Marcouf was an engagement fought off the Îles Saint-Marcouf near the Cotentin peninsula on the Normandy coast of France in May 1798 during the French Revolutionary Wars. Dislodging a British garrison on the islands was the main objective for French forces. The garrison (which had been in place since 1795) allowed the islands to serve as a resupply base for Royal Navy ships patrolling northern French waters. Apart from expelling the British, the French sought to test new equipment and tactics, which had allegedly been developed with an intention of invading Britain.