Question: Forgotten Voices of the Great War is part of the oral archive at a British national museum organisation founded in what year?

Context paragraphs:
Forgotten Voices of the Great War: Forgotten Voices of the Great War is a collection of interviews with people who lived through the First World War.  The book is part of the Imperial War Museum's oral archive.

Forgotten Voices of the Falklands: Forgotten Voices of the Falklands uses the resources of the Imperial War Museum’s Sound Archive to present the first complete oral history of the Falklands War.  The book presents a chronicle of the conflict from many different perspectives, told in the participants’ own voices from the initial invasion of the islands to the British landings to the Argentine surrender and its aftermath.

National Museum Library: The National Museum Library is a division of the Department of National Museum in Sri Lanka functioning as its library and archive for its collection of books and documents.  Established on January 1, 1877 as the Colombo National Museum Library when the Colombo National Museum was established, it incorporated the Government Oriental Library that had been established in 1870.  Since 1885, by law, a copy of every document printed in the country has to be deposited in the museum library as it functioned as the oldest legal deposit in Sri Lanka.

British Movement: The British Movement (BM), later called the British National Socialist Movement (BNSM), is a British Neo-Nazi organisation founded by Colin Jordan in 1968.  It grew out of the National Socialist Movement (NSM), which was founded in 1962.  Frequently on the margins of the British far-right, the BM has had a long and chequered history for its association with violence and extremism.  It was founded as a political party but manifested itself more as a pressure and activist group.  It has had spells of dormancy.

Imperial War Museum (disambiguation): The Imperial War Museum is a British national museum organisation with branches at five locations in England.

Forgotten Voices of the Second World War: Forgotten Voices of the Second World War consists of interviews with soldiers, sailors, airmen and civilians of most nationalities who saw action during World War II.  The interviews were drawn from the Imperial War Museum's sound archive.  Many of the recordings had not been heard since the 1970s.  As well as putting the interviews into chronological and campaign order, Arthur also puts the surrounding events into context.

Forgotten Voices of the Holocaust: Forgotten Voices of the Holocaust is a collection of interviews with victims of the Holocaust as well as people who collaborated with or worked directly for the Nazi regime.  The Imperial War Museum commissioned Lyn Smith to work with them on their sound archive.  The interviews she brought together are now part of their permanent Holocaust exhibit as well as being set down in this book from Ebury Press.

Imperial War Museum: Imperial War Museums (IWM) is a British national museum organisation with branches at five locations in England, three of which are in London.  Founded as the Imperial War Museum in 1917, the museum was intended to record the civil and military war effort and sacrifice of Britain and its Empire during the First World War.  The museum's remit has since expanded to include all conflicts in which British or Commonwealth forces have been involved since 1914.  As of 2012, the museum aims "to provide for, and to encourage, the study and understanding of the history of modern war and 'wartime experience'".

Max Arthur: Max Arthur OBE is an oral and military historian and author who specialises in first-hand recollections of the twentieth century in particular the First and Second World War.  His most noted work is 'Forgotten Voices of the Great War' and 'Forgotten Voices of the Second World War' both in association with the Imperial War Museum.

Forgotten Voices: A series of audio tapes and books put together by the Imperial War Museum (IWM), the Forgotten Voices series brings the IWM's sound archive to life.  The sound archive features thousands of interviews with people who survived wars in which the British were involved in the 20th Century.  Each book has been compiled by an individual 'author', though with the exception of the introduction to each chapter, almost the entirety of each book is made up of the archive extracts.

Supporting paragraphs: Forgotten Voices of the Great War Imperial War Museum
Answer: 1917