Ambleteuse is a picturesque village that used to be a harbour and has a lot of association with England just across the Channel. The reason it is here relates to the temporary needs of various invaders for conquering people from either side of the English Channel. It is said that Julius Caesar used this convenient place to set out from for his invasion of Britain in 54 BC. Henry VIII of England had two forts built here to maintain a show of power towards the French kings. James II fleeing England after his abdication arrived here in 1689 and Fort Mahon, built to protect the harbour in the seventeenth century, was used by Napoleon to moor part of his England invasion fleet in 1805.