Hundred Years' War
Historians commonly divide the war into three phases separated by truces: the Edwardian War (1337–1360), the Caroline War (1369–1389), and the Lancastrian War (1415–1453). Local conflicts in neighbouring areas, which were contemporarily related to the war, including the War of the Breton Succession (1341–1365), the Castilian Civil War (1366–1369), the War of the Two Peters (1356–1369) in Aragon, and the 1383–85 crisis in Portugal, were availed by the parties to advance their agendas. Later historians adopted the term "Hundred Years' War" as a historiographical periodisation to encompass all of these events, thus constructing the longest military conflict in European history.
England
During the 14th century, the Plantagenets and the House of Valois both claimed to be legitimate claimants to the House of Capet and with it France; the two powers clashed in the Hundred Years' War. The Black Death epidemic hit England; starting in 1348, it eventually killed up to half of England's inhabitants. From 1453 to 1487 civil war occurred between two branches of the royal family – the Yorkists and Lancastrians – known as the Wars of the Roses. Eventually it led to the Yorkists losing the throne entirely to a Welsh noble family the Tudors, a branch of the Lancastrians headed by Henry Tudor who invaded with Welsh and Breton mercenaries, gaining victory at the Battle of Bosworth Field where the Yorkist king Richard III was killed.