The book's title was drawn from the expression "Lions led by donkeys" which has been widely used to compare British soldiers with their commanders. In 1921 Princess Evelyn Blücher published her memoirs, which attributed the phrase to OHL (the German GHQ) in 1918. Clark was unable to find the origin of the expression. He prefaced the book with a supposed dialogue between two generals and attributed the dialogue to the memoirs of German general Erich von Falkenhayn. Clark was equivocal about the source for the dialogue for many years, but in 2007, his friend Euan Graham recalled a conversation in the mid-1960s when Clark, on being challenged as to the dialogue's provenance, looked sheepish and said, "Well I invented it." This supposed invention emboldened critics of "The Donkeys" to condemn the work.