Founded in the eleventh century, the earliest records (1080–1082) include the name Sancte Marie Ecclesia, Latin for "Church of St. Mary", while a later document written in Norman-French (1317) mentions Saincte Mariglise. The current French form of the name is ambiguous, with the additional meaning, "Holy Mother Church". The town was significantly involved in the Hundred Years' War as well as the Wars of Religion.
The town's main claim to fame is that it played a significant part in the World War II Normandy landings because this village stood right in the middle of route N13, which the Germans would have most likely used on any significant counterattack on the troops landing on Utah and Omaha Beaches. In the early morning of 6 June 1944 mixed units of the U.S. 82nd Airborne and U.S. 101st Airborne Divisions occupied the town in Mission Boston, giving it the claim to be one of the first towns liberated in the invasion.
