After three days' hard fighting the place was taken.

Rennes was next besieged, and presently surrendered.
Other towns fell into his hands, and so far as Brittany was concerned all opposition, except in one or two fortresses, ceased.

In the meanwhile Charles of Blois sought assistance from his uncle the King of France; the Count de Montford, therefore, crossed to England and besought the aid of King Edward, and did homage to him as King of France.

Edward, on his part, promised to assist him.

The fact that Phillip was sure to espouse the opposite side was in itself sufficient to decide him; besides which, the dukes of Brittany have always been in a special way connected with England and bear the English title of Earls of Richmond.
"Believing that his journey, which had been a secret one, was unknown to the King of France, De Montford went boldly to Paris, where he had been summoned by the king to an assembly of peers called to decide upon the succession.