Disenchantment was one of the first books written after the First World War to express a sense of liberal disillusionment with the way the war had been conducted. It had a considerable impact when it was first published in 1924, though it was overshadowed later by the angrier and more directly descriptive memoirs of Sassoon and Graves.

Montague offers a unique perspective on the war in France. He joined up as a white-haired 47-year-old volunteer, as part of a unit of the Royal Fusiliers manned mainly by older sportsmen (he had been a keen mountaineer before the war). He was also a very senior journalist, a leader writer for the Manchester Guardian. After being wounded in action in early 1916, he became an intelligence officer, dealing with journalists and visiting writers and censoring their reports.

His book is highly allusive, replete with references to classical literature, and recalls a pre-war kind of essayistic belles-lettres (the book first appeared as a series of essays in the Guardian). These techniques are placed at the service of a rueful meditation on the cynicism, corruption and mendacity of the organization of the British war effort, especially the official propaganda about the aims of the war.

Montague was writing at a time of desperate social unrest, industrial militancy and rising intolerance. 'Civilization itself', he wrote, 'the at any rate habitable dwelling which was to be shored up by the war, wears a strange new air of precariousness'.