Sir Walter Manny with his party were therefore enabled to mount the walls unobserved and make their way into the town; here they fell upon the defenders in the rear, and the sudden onslaught spread confusion and terror among them.

The parties at the gates forced their way in and joined their friends, and the whole of the garrison were killed or taken prisoners, save a few, including Oliver Clisson, who made their escape by sally-ports.

Robert of Artois, with the Earl of Stafford, was left with a garrison to hold the town.

The Earl of Salisbury, with four thousand men, proceeded to lay siege to Rennes, and Sir Walter Manny hastened back to Hennebon.
Some of Sir Walter's men formed part of the garrison of Vannes, and among these was Sir John Powis with a hundred men-at-arms.
The knight had been so pleased with Walter's coolness and courage at the siege at Hennebon that he requested Sir Walter to leave him with him at Vannes.

"It is possible," he said to Walter, "that we may have fighting here.