Military Ancestor

Army Regiments and Corps Supporting guide

In What Order Should I Research a Unit?

Work in this order: service record, then war diary for the battalion and dates, then regimental museum and published history. That order keeps the person anchored before the unit story takes over.

Published 31 October 2026 | Independent educational guidance | Deceased persons only

Filed under Army Regiments and Corps: A Method Guide

Where should you start looking?

Work in this order: service record, then war diary for the battalion and dates, then regimental museum and published history. That order keeps the person anchored before the unit story takes over.

Records disagree more often than stories do, and that is useful: a disagreement points to a transfer, a renumbering, or a variant spelling, each of which can be tested. A single record can be wrong on a detail, so a match needs more than one agreement, and a disagreement needs a note, not a deletion.

The order to work in

Before each step, ask what it would prove and what it would disprove. A step with no test value is a detour, however interesting it looks. Order matters more than speed here. The same records, opened in a different order, produce a different timeline, and only one of those orders can be checked.

  1. Take the regiment or corps and the battalion from the personal file, with dates.
  2. Check whether the unit was amalgamated, renumbered or converted, and over which dates.
  3. Open the unit records for the posting dates only, and note their references.
  4. Use regimental museums and published histories only after the unit record for those dates has been read.

As an illustration only, suppose a photograph shows a cap badge but the posting entry names a different regiment: the posting entry wins, and the badge then becomes a question about attachment or a later transfer, not proof of service in the badge unit.

Common traps in this record type

A gap of a few weeks in a diary, a log, or a file is normal. A gap of months, in the same record, is a question. Learn the normal gap size for the record type. A record that exists but is not digitised is not a dead end, it is a different route: a catalogue reference, a copy order, or a visit, where the holder offers one. If the trail ends at a particular holder, the next step is to ask that holder where the record went, not to search the same catalogue harder.

What should you check next?

If this record answered your question, stop and note the reference. The next record should start from a new question, not from momentum. The related guides at the foot of this page link back to the pillar for this section and to the neighbouring guides, so you can move through the cluster without losing the person you started with.

Check the next record in the chain, not the next story about the same person. A good stopping point is a referenced fact and a named next record. Stop there, even if the story feels unfinished.

Primary sources for this guide

Claims in this guide are kept general and point to official holders, so you can check the current position with the holder itself. This guide is general educational information only. It is not personal professional advice, it does not offer a record lookup service, and it does not determine any individual's service.

Please note: This site covers deceased persons only, respects the privacy of living people, and never publishes material that identifies a living person from a service record. If a step here describes a holder's process, follow the holder's current guidance for your own case.