King's Own Yorkshire Light Infantry Research Guide (WWII)

📖 King's Own Yorkshire Light Infantry soldiers in WWII at a Glance

The King's Own Yorkshire Light Infantry issued Second World War service numbers between 4680001–4736000. Battalions served with the BEF, in Norway, the Middle East, North Africa, Burma and North-West Europe, while the regiment retained strong recruiting links with Doncaster, Wakefield and Barnsley.

Why Interpretation Can Be Difficult

  • The regiment served in an exceptional range of theatres, including the BEF, Norway, the Middle East, North Africa, Burma and North-West Europe, making battalion identification essential.
  • Service numbers identify the regiment, not the battalion, so they cannot determine where a soldier fought without supporting evidence such as service records or medal entitlement.
  • Early-war volunteers and later conscripts served alongside one another, meaning two KOYLI soldiers with relatively similar service histories may have entered the regiment through very different recruitment systems.
  • Traditional Yorkshire recruiting areas remained influential despite national recruitment, making birthplace a useful clue but not definitive proof of service with the regiment.
  • Campaign medals may point towards a theatre of war, but several battalions served in different campaigns simultaneously, meaning medals alone rarely provide enough evidence to identify a soldier's exact wartime path.

he King's Own Yorkshire Light Infantry developed one of the most varied wartime records of any Yorkshire infantry regiment, combining strong county traditions with service across an exceptionally wide range of operational theatres. As the demands of the Second World War reshaped recruitment and deployment, the regiment retained its distinctive identity while its battalions followed remarkably different wartime paths. This makes the King's Own Yorkshire Light Infantry particularly rewarding to research, as service numbers, battalion organisation, campaign medals and traditional recruiting patterns all provide valuable clues about an individual's military career. Understanding how these different strands fit together is often the key to moving beyond a regimental name and accurately reconstructing a soldier's wartime service. This guide brings those themes together, explaining how the regiment evolved during the war and how surviving military records, family evidence and regimental history can be combined to build a much clearer picture of a King's Own Yorkshire Light Infantry soldier's service.

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King's Own Yorkshire Light Infantry Service Numbers

For military researchers and family historians, service numbers provide one of the strongest starting points when investigating a King's Own Yorkshire Light Infantry soldier. Men enlisted directly into the regiment during the Second World War were generally issued numbers within the range 4680001–4736000, making this an important indicator of a potential regimental connection. While a service number alone cannot identify a battalion, company or theatre of service, it can often confirm enlistment into the King's Own Yorkshire Light Infantry and provide a valuable foundation for further research. When combined with medal groups, casualty records, photographs or surviving family documents, these numbers help narrow down a soldier's likely wartime career and distinguish KOYLI soldiers from members of neighbouring Yorkshire regiments. In many cases, identifying a service number within this allocation is the first major breakthrough in reconstructing an individual's military service, allowing researchers to focus their efforts on the correct regiment before exploring battalion histories and surviving archival records.

A Truly Global Wartime Record

The King's Own Yorkshire Light Infantry compiled one of the most geographically diverse operational histories of any British infantry regiment during the Second World War. Battalions served with the British Expeditionary Force in 1940 before seeing action in Norway, the Middle East, North Africa, Burma and North-West Europe during the liberation of the continent in 1944–45. This extraordinary operational record meant that two KOYLI soldiers serving during the same period could have fought under completely different conditions, from Arctic operations in Norway and desert warfare in North Africa to the harsh climate of the Middle East, the jungles of Burma and the final advance across Western Europe. Few regiments experienced such a varied wartime journey, making battalion identification particularly important when reconstructing an individual's military career. Knowing the regiment alone is rarely enough to determine where a soldier fought, as each battalion followed its own distinct operational path.

National Recruitment with Strong Yorkshire Roots

Although recruitment into the British Army became increasingly national during the Second World War—particularly following the expansion of the General Service Corps in 1942—the King's Own Yorkshire Light Infantry retained strong historic links with its traditional recruiting areas. Doncaster, Wakefield and Barnsley continued to supply many recruits and remained closely associated with the regiment's identity, traditions and public profile throughout the conflict. Nevertheless, wartime manpower demands meant that KOYLI soldiers increasingly arrived from all parts of Britain rather than Yorkshire alone. This makes birthplace a much less reliable indicator of regiment than it had been before the war. For family historians, Yorkshire connections remain valuable supporting evidence, but they should always be considered alongside service numbers, medal entitlement and military records when reconstructing an individual's wartime service. Understanding the balance between traditional county recruitment and a nationally organised wartime army is often essential when interpreting the service of a King's Own Yorkshire Light Infantry soldier.

Case Study: Researching army number 4696391

A researcher began with just a single clue: the service number 4696391, engraved on the rim of a campaign medal. There was no battalion, no service record and no surviving family paperwork. Entering the number into the Army Service Explorer immediately confirmed that the soldier had served with the King's Own Yorkshire Light Infantry, providing the first firm foundation for further research. The service number also suggested that he most likely enlisted during the early wartime volunteer phase (1939–41), before the rapid expansion of the Army through large-scale wartime conscription.

The guide then explained that, although recruitment became increasingly national during the Second World War—particularly following the introduction of the General Service Corps—the regiment retained particularly strong links with Doncaster, Wakefield and Barnsley. These traditional recruiting areas remained closely associated with the King's Own Yorkshire Light Infantry throughout the conflict, helping place the soldier within the regiment's wider historical and geographical context.

The Army Service Explorer also outlined the regiment's exceptionally varied wartime service. Depending on his battalion, the soldier may have served with the British Expeditionary Force, fought in Norway, the Middle East, North Africa, Burma or North-West Europe during the final campaigns of 1944–45. Potential campaign medal entitlement reflected these different theatres and could include the France and Germany Star, Africa Star or Burma Star, alongside the 1939–45 Star, Defence Medal and War Medal 1939–45. The tool also placed the regiment's wartime sacrifice into context, recording approximately 1,198 deaths and an estimated 3,041 total casualties, representing around 0.53% of all British Army deaths during the conflict. Although these figures relate to the regiment as a whole rather than a specific battalion, they help illustrate the scale of the King's Own Yorkshire Light Infantry's wartime contribution while providing a clear framework for further research.

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Tips

  • Don't Overlook Norway or the Middle East: Family stories often focus on Burma or North-West Europe, but the King's Own Yorkshire Light Infantry also served in Norway and the Middle East. If early photographs, letters or memories point towards these less common theatres, they can provide valuable clues when identifying the correct battalion and reconstructing a soldier's wartime service.

  • Battalion Is the Key to Understanding Service: The King's Own Yorkshire Light Infantry served with the BEF, in Norway, the Middle East, North Africa, Burma and North-West Europe. Identifying the battalion is therefore essential, as it determines which campaign medals a soldier may have received and where he most likely served.

Explore similar units:

  1. King's Own Yorkshire Light Infantry: Compare the regiment in WWI & WWII
  2. Northumberland Fusiliers: Another of the North Easts prominent regiments
  3. Durham Light Infantry: A geographic neighbour and another LI regiment

Click here to explore similar infantry regiments in the main WWII Regiment & Corps Library.

This hub is intended for genealogical and historical research purposes. It provides the logical framework for navigating the WWII history of The King's Own Yorkshire Light Infantry