Military Ancestor

Army Service Records Supporting guide

How Do I Research ATS Service?

Auxiliary Territorial Service records follow the same personal file method as other Army service, with attention to enrolment, trade, posting and discharge. The corps or unit of posting, not a general label, tells you what one woman's service involved.

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

Filed under Army Service Records: A Method Guide

Where should you start looking?

Auxiliary Territorial Service records follow the same personal file method as other Army service, with attention to enrolment, trade, posting and discharge. The corps or unit of posting, not a general label, tells you what one woman's service involved.

Fix the person first, then the record. Searching for a record before you have fixed the person is how two people become one timeline. A record set arranged by unit will not yield to a surname search, and a record set arranged by date will not yield to a unit search. Learn the arrangement first. Do not trust a result because it is the only result. A single result with one matching filter is a lead that needs a second record, not a conclusion.

How do you read what you find?

Read appendices, maps and marginal notes as part of the entry, not as extras. An appendix can settle a place name, a date, or a name that the daily text leaves vague. Do not assume a modern map, a modern rank table, or a modern unit list applies to a record from another decade. Check the period source for the period entry. An entry that names a place but no unit, or a unit but no date, is a partial clue. Use it to frame the next search, not to close the question.

Dead ends to expect here

The most common reason a search fails is a date filter that is too tight. Widen the range by a year on each side before you conclude anything is missing. Do not mistake a digitised index for the whole record set. An index that covers part of a series will hide entries that the full catalogue would show. A search in the wrong language of indexing, modern terms for period records, will fail silently. Use the period terms the catalogue itself uses.

Working through it in order

If you are unsure which step comes first, choose the step that fixes a date. Dates order everything else, and an unfixed date disorders everything else. Keep your notes in the same order as the steps, so that a later reader, including yourself in six months, can retrace the work. A session that ends with a tidy list of references and open questions is a successful session, even if it ends with no new story.

  1. Fix the service dates first, so you know which holder is likely to hold the file.
  2. Note the regiment or corps and the service number together, exactly as written.
  3. List postings and transfers in date order, and treat each transfer as a new thread to check.
  4. Test every later record, medal, casualty or war diary entry, against the personal file before adding it to the timeline.

Where to go next from here

A session that ends with three referenced facts and one named next step has succeeded, even if the story feels shorter than you hoped. Keep the person, the number and the dates together as you move to the next record, and re-check them on arrival. Filters drift when they are carried in memory.

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. A single well-checked fact is worth a page of plausible narrative. Prefer the fact, and let the narrative wait for more facts.

Primary sources for this guide

Everything here is kept general and tied to official holders, so check the current position with the holder for your own case. The guide is educational information only: it is not personal professional advice, it is not a lookup service, and it settles nothing about any one person's service.

Please note: Coverage here is limited to deceased persons, and living people's privacy is protected: no material on this site identifies a living person from a service record. A holder's process, where described, should be followed as the holder currently sets it out.