1065 Battle of Dinan

Conan 2 vs William the bastard in the Breton-Norman war
France
William of Normandy sent word to Brittany, warning them against attacking his lands, because he was backed by the pope.

Conan 2 of Brittany said to William that he would take the opportunity to invade, William's army set out for battle.

Outside the monastery of Mont Saint-Michel, two Norman soldiers became mired in quicksand, but Harold Godwinson, saved their lives.
William the conqueror`s army chased Conan from Dol-de-Bretagne to Rennes and the Britons finally surrendered at Château de Dinan.
William ordered the construction of ships
England
An unexpected ally came to Harald Godwinson. King Harold’s brother Tostig had been deprived of his earldom in Northumbria by Edward in October 1065