This series contains records and correspondence for Regular Army and Emergency Reserve officers who served in the First World War.
The content of the files varies enormously, from a note supplying date of death, to a file of several parts containing attestation papers, record of service, personal correspondence and various other information. For the majority of the series there is no correspondence date range.
Records of British reserve officers who were commissioned into the Indian Army were originally held separately, but later added to this series.
The entire series has been made available 75 years after the notional end of the series (1922). Due to War Office filing practices, later material has occasionally been added to files, potentially delaying their opening, but the whole series was released together.