Hundred Years' War: Battle of La Rochelle.

The Lancastrian War was the third and final phase of the Hundred Years' War between England and France. It lasted from 1415, when Henry V of England invaded Normandy, to 1453, when the English were definitively defeated in Aquitaine. It followed a long period of peace from the end of the Caroline War in 1389. The phase is named after the House of Lancaster, the ruling house of the Kingdom of England, to which Henry V belonged.

The naval Battle of La Rochelle of 1419 took place between a Castilian and an allied Flemish-Hanseatic fleet. The Castillian victory resulted in their naval supremacy in the Bay of Biscay. but it also led to a protracted conflict with Flanders and the Hanseatic League, which ended in 1443 with further commercial concessions to Castile. The battle was notable for the use of guns by the Castilian fleet.