Over 640,000 men and women enlisted in the Canadian Expeditionary Force (CEF) during the First World War as soldiers, nurses and chaplains. In this episode, we will look at the service files of these men and women to find out the types of documents that are found in them, their research value and how they ended up at Library and Archives Canada. Joining us today from Library and Archives Canada are archivist Marcelle Cinq-Mars, and genealogy consultant Sara Chatfield.