In the Middle Ages the English were famous for their very powerful longbows, used "en masse" to great effect against the French in the Hundred Years' War, with notable success at the battles of Crécy (1346), Poitiers (1356), and Agincourt (1415). During the reign of Edward III of England, laws were passed allowing fletchers and bowyers to be impressed into the army and enjoining them to practise archery. The dominance of the longbow on the battlefield continued until the French began to use cannon to break the formations of English archers at the Battle of Formigny (1450) and the Battle of Castillon (1453). Their use continued in the Wars of the Roses however and they survived as a weapon of war in England well beyond the introduction of effective firearms. The average length of arrow shafts recovered from the 1545 sinking of the Mary Rose is . In 1588, the militia was called out in anticipation of an invasion by the Spanish Armada and it included many archers in its ranks; the Kent militia for instance, had 1,662 archers out of 12,654 men mustered.