Bény-sur-Mer is a commune in the Calvados department in the Normandy region, in northwestern France. It lies 5 km south of Bernières-sur-M…Bény-sur-Mer is a commune in the Calvados department in the Normandy region, in northwestern France. It lies 5 km south of Bernières-sur-Mer and 13 km north of Caen. During World War II, Bény-sur-Mer was liberated on D-Day by Le Régiment de la Chaudière, a French Canadian unit. There was a gun battery located near the town at the time.