 King John lost all his territories in mainland Normandy in 1204 to King Philip II Augustus, but retained possession of Jersey and the other Channel Islands.In the Treaty of Paris (1259), the English king formally surrendered his claim to the duchy of Normandy and ducal title, and since then the islands have been internally self-governing territories of the English crown and latterly the British crown.On 7 October 1406, 1,000 French men at arms led by Pero Niño invaded Jersey, landing at St Aubin's Bay and defeated the 3,000 defenders but failed to capture the island.