During World War II, Operation Abercrombie was an Anglo-Canadian reconnaissance raid on the area around the French coastal village of Hardelot, located south of Boulogne-sur-Mer, in the Pas-de-Calais. It had been scheduled for the night of 19/20 April 1942, but delayed until 21/22 April. The raid was largely unopposed but, on review, the benefits were thought not to have been worth the effort. Due to a navigation error the Canadian detachment lost their way and had to abort.