The Difference Between Service Records, Unit Diaries, and Nominal Rolls

When people start researching a family member's military service, they usually begin with a single goal: find "the record." But there isn't one record. There are several different types of military documents, held in different places, created for different purposes, and containing very different information. Understanding which is which saves an enormous amount of confusion - and helps you find what you're actually looking for.

The three most important document types for Australian military research are service records, unit war diaries, and nominal rolls. They're related but distinct, and each tells a different part of the story.

Service records

A service record is the personal file for an individual who served in the Australian military. It tracks that person's entire period of service from enlistment to discharge - and sometimes beyond, if they applied for post-war benefits or had ongoing medical claims.

Service records are held by the National Archives of Australia (NAA). They're individual documents - one record per person. A typical WWI service record might be 15 to 30 pages long and include attestation papers (the enlistment form), proceedings or history sheets (the chronological record of service), medical records, correspondence, and discharge papers.

What service records contain

The strength of a service record is its personal detail. It tells you about one specific person: their name, age, occupation, physical description, next of kin, religious denomination, and then a dated sequence of every significant event during their service. Enlistment. Training. Embarkation. Transfers between units. Hospital admissions. Wounds and illness. Promotions and demotions. Disciplinary actions. Discharge.

The entries are written in military abbreviations - TOS, SOS, TRF, adm., RTU, RTA - and reference units, locations, and hospitals using the conventions of the time. The record is administrative in nature: it was created to track a person through the military system, not to tell their story. But it contains the raw material from which a story can be reconstructed.

Where to find service records

All Australian military service records are held by the NAA. WWI records have been extensively digitised and many are freely available online through the NAA's RecordSearch database. WWII and post-war records may need to be requested, which is also free but takes longer. The NAA series numbers vary by service and conflict - B2455 for AIF personnel (WWI Army), A6769 for WWI Navy, B883 and B884 for WWII Army, A9300 and A9301 for RAAF.

Unit war diaries

A unit war diary is a daily operational record kept by a military unit while on active service. It records what the unit did each day: where it was, what operations it was involved in, what conditions it was operating under, and what happened. Unit war diaries are collective documents - they record the experience of the unit as a whole, not individual soldiers.

Unit war diaries are held by the Australian War Memorial (AWM), not the NAA. This is one of the most common points of confusion: the personal record of the individual is at the NAA, the operational record of the unit is at the AWM.

What unit war diaries contain

The content varies enormously. Some war diaries are extraordinarily detailed, with daily entries describing trench positions, patrol routes, enemy activity, shelling patterns, gas attacks, weather, morale, and individual acts of bravery. Others are sparse - a line or two noting the unit's location and nothing else. The quality depended on the officer responsible for maintaining the diary and the conditions under which they were writing.

Many diaries include appendices: operational orders, patrol reports, intelligence summaries, sketch maps, casualty lists, and after-action reports. These appendices often contain the most granular detail about what happened on specific days.

Where to find unit war diaries

WWI unit war diaries are held under AWM series AWM4, organised by unit type and number. They have been fully digitised and are freely available online through the AWM's collection database. WWII unit war diaries are under AWM series AWM52, but not all have been digitised - some may need to be viewed at the AWM Research Centre in Canberra or requested as copies.

How unit diaries connect to service records

This is where it gets powerful. If a service record tells you that your ancestor was in the 7th Battalion on 20 July 1916, the 7th Battalion's war diary for that date tells you what the battalion was doing - and what your ancestor was likely experiencing. The service record gives you the individual. The war diary gives you the context. Together, they connect your ancestor's record to real battles and campaigns.

Nominal rolls

A nominal roll is a list of names. Specifically, it's a list of personnel who served in a particular conflict, campaign, or operation. Nominal rolls are summary documents - they confirm that a person served, but they don't contain the detailed information found in a service record.

The most commonly used nominal rolls for Australian military research are the embarkation rolls and the DVA nominal rolls.

Embarkation rolls

Embarkation rolls record the personnel who departed Australia on specific troopships. They're held by the AWM under series AWM8 and are searchable online. A typical entry includes the person's name, rank, service number, unit, and the name and date of the ship they embarked on. They're useful for confirming when someone left Australia and which unit they were with at that point.

DVA nominal rolls

The Department of Veterans' Affairs maintains nominal rolls for WWII, Korea, the Malayan Emergency, Indonesian Confrontation, Vietnam, and the First Gulf War. These are searchable online and provide basic summary information: name, service number, date of birth, date of enlistment, date of discharge, and unit. They're a good starting point for confirming service but don't contain the detailed entries found in a full service record.

What nominal rolls don't contain

Nominal rolls are indexes, not records. They'll tell you that Private J. Smith served in the 7th Battalion and embarked on HMAT Euripides on 11 October 1916. They won't tell you what happened to him after that, where he was wounded, which hospital he was sent to, or when he came home. For that, you need the service record.

Which document do you need?

It depends on what you're trying to find out. If you want to confirm that someone served and find their basic details, a nominal roll is the fastest starting point. If you want to understand what happened to them personally - their movements, medical history, conduct, and discharge - you need the service record from the NAA. If you want to understand what was happening around them at specific points during the war, you need the unit war diary from the AWM.

For most family history research, you'll eventually want all three. The nominal roll confirms who served. The service record tells you what happened to them. The war diary tells you what they were in the middle of when it happened.

What a decode uses

A Decode My Digger decode works from the service record - the personal file held by the NAA. But the decode process doesn't stop at translating the entries on that record. It cross-references the dates, units, and locations against unit war diaries, campaign histories, and operational records to build the full context around each entry. The result is two documents: a line-by-line Excel spreadsheet of every entry with its plain-language translation, and a contextualised Word narrative that places the individual's service within the broader story of the war.

You supply the service record. The decode does the rest.

Frequently asked questions

Are service records and unit war diaries held in the same place?

No. Service records (individual personnel files) are held by the National Archives of Australia (NAA). Unit war diaries (operational records of military units) are held by the Australian War Memorial (AWM). This is one of the most common points of confusion in military family research.

Can I access all of these documents for free?

Yes. Service records at the NAA, unit war diaries at the AWM, and nominal rolls through the AWM and DVA are all freely accessible. Many have been digitised and are available online. Some WWII and post-war records may require a request, which is also free but takes longer to process.

Which document should I start with?

If you know the person's name and approximate period of service, start with a nominal roll or the NAA's RecordSearch to confirm their details and find the service record. The service record is the most important single document for understanding an individual's military service.

Do unit war diaries mention individual soldiers by name?

Sometimes. Officers are more commonly named than other ranks. Casualty lists appended to war diaries often name individuals. Some diaries mention specific soldiers in connection with acts of bravery or significant events. But in general, war diaries record unit-level activity rather than individual stories - that's what the service record is for.

What if I can't find my ancestor on a nominal roll?

Nominal rolls are not complete for all conflicts and services. WWI embarkation rolls are comprehensive, but some WWII and post-war nominal rolls have gaps. If you can't find someone on a nominal roll, try searching the NAA's RecordSearch directly using the person's name and any other details you have (service number, date of birth, unit). The service record may exist even if the person doesn't appear on a publicly available nominal roll.