On 13 October, Charles de Royrand and his 3,000 men of the Catholic and Royal Army of Centre took refuge in Mortagne after having been pushed back by the Luçon division of general Antoine Bard, strong of 3,500 soldiers who had burnt down Les Herbiers and La Verrie.
Bec-de-Mortagne in the Pays de Caux is thought to be the birth-place of Turstin FitzRolf, standard bearer to William the Conqueror at the Battle of Hastings in 1066, as he was described by the 12th-century chronicler Orderic Vitalis as from "Bec-en-Caux".
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The name comes from ‘’Becr’’, a Norse word for stream, together with the name of the Mortagne family, seigneurs of the village.
Born in Mortagne-sur-Sèvre in Poitou, to Charles Peyroux, an apothecary and surgeon, and Marguerite Suzanne Joudad, he conceived the idea of resettling the exiled Acadians in Spanish Louisiana.
Despite his lack of education, he had successes at Mortagne and the battle of Cholet.
The site of the famous La Trappe Abbey was for centuries isolated in a valley surrounded by forests, streams and lakes, 9 miles from Mortagne and 84 miles from Paris, in the Diocese of Séez and the former province of Normandy.
Rambervillers was the creation in the ninth century of a man called Rambert, who was the Count of Mortagne, or the Abbot of Senones: sources differ.
The greater part of the district is occupied by a semicircle of heights (from 650 to 1000 ft. in height) stretching from Moulins-la-Marche on the northwest to Montmirail on the south; within the basin formed thereby the shape of which is defined by the Huisne, an affluent of the Sarthe, lie the chief towns of Mortagne-au-Perche, Nogent-le-Rotrou and Bellême.