Series consists of records created and accumulated by the Army Historical Section in the course of fulfilling its mandate to document Canadian military history from 1919 to 1964. The series is comprised of 17 sub-series: Registry Files, Unit Files, CEF Historian's Files, Subject Files, GAQ Files, Cummins' Notes, Davidsons' Notes, Fowler's Notes, Scanlon Files, Official History, Printed Material, Special Records, Memorial Chamber, Book of Remembrance, Historical Officers Reports, Nominal Rolls and Lists.