In 1420, "Grace Dieu"made her only voyage under the command of the Earl of Devon, with orders to sail down the English Channel. The expedition suffered a mutiny even before leaving port, when the crew objected to soldiers and archers being aboard to guard the vessel. "Grace Dieu"'s sailors attempted to prevent the soldiers from boarding by abusing the clerk who was registering their names and threatening to throw the register into the sea. When the ship finally left port, nine of the crew incited a further mutiny against the captain by refusing to take their stations and insisting that the cruise be abandoned. "Grace Dieu" was brought into the nearest port, St. Helen's on the Isle of Wight, and the crew departed. A clerk who questioned their loyalty as they departed was assaulted and had his clothing torn.