On 01 Aug 939 Hugh Maine II Count Maine (age 19), Alan "Twisted Beard" Poher II Duke Brittany (age 39) and Judicael Berengar Penthièvre I Count Rennes defeated the Viking army at Battle of Trans la Foret in Trans-la-Foret freeing Brittany of Viking occupation and leading to the establishment of the Duchy of Brittany.