The Battle of Cadzand was an early skirmish of the Hundred Years' War fought in 1337. It consisted of a raid on the Flemish island of Cadzand, designed to provoke a reaction and battle from the local garrison and so improve morale in England and amongst King Edward III's continental allies by providing his army with an easy victory. On 9 November Sir Walter Manny, with the advance troops for Edward III's continental invasion, made an attempt to take the city of Sluys, but was driven off.

The Battle of Arnemuiden was a naval battle fought on 23 September 1338 at the start of the Hundred Years' War between England and France. It was the first naval battle of the Hundred Years' War and the first recorded European naval battle using artillery, as the English ship Christopher had three cannons and one handgun.