Peter Hammond Liddle OBE FRHistS (born 1934) is a British historian and author specialising in the study of the First and Second World Wars.
[1] In 1968 Liddle started interviewing people about their lives during and around the First World War, collecting oral history from the era.
[2] In 1974 Liddle visited New Zealand, where he interviewed 150 war veterans and took the diary of Hartley Valentine Palmer.
Liddle then worked at Leeds for ten years as the "Keeper of the Collection" to develop the archive.
[8] Liddle was appointed Officer of the Order of the British Empire (OBE) in the 2023 Birthday Honours for services to heritage and public understanding of the World Wars.