Sir Douglas Haig was a British commander during the Battle of the Somme, the Battle of Arras, the Battle of Passchendaele, the German Spring Offensive, and the final Hundred Days Offensive of the First World War. When reassessed in the 1960s his leadership was criticised for resulting in costly offensives, gaining him the nickname 'the Butcher of the Somme'. Gary Sheffield is a Professor of War Studies at the University of Wolverhampton, and a specialist on Britain at war 1914-45. He spoke to Dan about whether Haig has been fairly assessed in the textbooks.