The National Archives holds records for the
majority of British army officers who served in the First World
War. However, the files of officers who were still serving after
31 March 1922, as well as those of officers who rejoined the army
after this date, are still held by the Ministry of Defence.
Moreover, the surviving officers' records themselves are incomplete.
Of the three original parts to an officer's file - the record of
service form (AF B 199), the confidential reports (AF B 196) and
the correspondence file - only the latter generally still exists.
The AF B 199s and 196s for officers commissioned after 1901, which
were stored separately from the correspondence files at the War
Office repository in Arnside Street, were destroyed in the German
bombing raid of September 1940.