The Battle of Passchendaele was a major battle of World War I. The First Doctor was on the field of battle and later regarded it as an awful event. (PROSE: Byzantium!) The Fifth Doctor listed Passchendaele as one of the many battlefields he had walked through. (PROSE: The King of Terror) Charley Pollard's uncle Jacques lost an arm during the battle. (AUDIO: The Next Life)