Operation Myrmidon was the planned raid during the Second World War by No. 1 Commando and No. 6 Commando in April 1942. This operation was an abortive raid on the Adour Estuary in south-western France. The plan was to disrupt road and rail transport between France and Spain by landing approximately 3,000 troops, consisting of two commandos, No. 1 and No. 6, who would be followed up by one and a half Royal Marine battalions along with an armoured regiment and a motor battalion.