The Gascon campaign of 1294 to 1303 was a military conflict between English and French forces over the Duchy of Aquitaine, including the Duchy of Gascony. The Duchy of Aquitaine was held in fief by King Edward I of England as a vassal of King Philip IV of France. Starting with a fishing fleet dispute and then naval warfare, the conflict escalated to open warfare between the two countries. In spite of a French military victory on the ground, the war ended when the Treaty of Paris was signed in 1303, which restored the status quo. The war was a premise to future tensions between the two nations culminating in the Hundred Years' War.