In this edition of Black's History Week, Professor Jeremy Black, whose books include A Short History of War, talks to The Critic's deputy editor, Graham Stewart, about how the feudal system, differing weaponry and firepower and the size of armies shaped medieval warfare.
Image: Henry V of England, attacked by the Duke of Alencon, at the Battle of Agincourt in 1415. Artist James William Edmund Doyle, 1864. (Photo by The Print Collector/Getty Images)