History books can tell us more about the horrors of the First World War than any poetry can. War poetry is based on the opinions of one person’s experiences whereas a history book can give an account of all the events and horrors that occurred. Because history books have been written after the war they can gather accounts from many different people and can tell the full story of the war. Shellshock in the First World War helped make many mad; Sassoon himself was nicknamed “Mad Jack” for near suicidal exploits. [10] War poetry may thus be an unreliable source, and it is only one among many that should teach history.