WWII Welsh & Irish Regiments

Researching a Welsh or Irish soldier's military service usually begins with identifying their regiment, battalion or service number. Official service records remain the most valuable source, but medal entitlement, cap badges, photographs and casualty records can also provide important clues. Once a regiment has been identified, the dedicated research hubs within this library explain service number allocations, recruiting traditions, wartime campaigns, battle honours and the theatres in which each regiment served, helping family historians build a more complete picture of an ancestor's wartime service.

The titles Fusilier and Rifle originated from specialised infantry roles developed centuries before the Second World War. Fusiliers were originally equipped with the lighter fusil flintlock musket, while Rifle regiments pioneered accurate rifle fire, open-order tactics and faster battlefield movement. By 1939 these distinctions had become historical traditions rather than tactical roles, yet the titles remained an important part of each regiment's identity and heritage.

The number of Irish infantry regiments serving in the British Army was significantly reduced between the two world wars as a result of major political changes. Following the establishment of the Irish Free State in 1922, six regiments closely associated with southern Ireland—including the Royal Munster Fusiliers, Royal Dublin Fusiliers and Connaught Rangers—were disbanded. By the outbreak of the Second World War, the remaining Irish infantry regiments were primarily those recruited from Northern Ireland, including the Royal Inniskilling Fusiliers, Royal Irish Fusiliers and Royal Ulster Rifles. Although fewer in number, these regiments continued to serve with distinction across Europe, North Africa, Italy and the Far East, while many thousands of men from both Northern Ireland and the Republic of Ireland also volunteered to serve in other British Army units throughout the war.

The regiments featured within this library served in almost every major campaign fought by the British Army during the Second World War. Depending upon the regiment and battalion, soldiers fought in France, North Africa, Sicily, Italy, Normandy, North-West Europe, Burma and the Far East. Individual battalions often served in different divisions and theatres, making it important to identify a soldier's specific unit when researching their wartime service.

Following the war, changing defence priorities and reductions in the size of the British Army led to a series of amalgamations affecting many famous Welsh and Irish regiments. Historic units combined to preserve their traditions while adapting to a smaller peacetime army, eventually forming new regiments that carried forward their battle honours, customs and heritage. Understanding these changes can be invaluable when tracing soldiers who continued serving after 1945 or interpreting later military records.

The unusual spelling of "Welch" often surprises researchers, but it reflects a long-standing historical tradition rather than a spelling mistake. Both "Welch" and "Welsh" were accepted English spellings for many centuries, and the regiment retained the older form as part of its official title. While modern English gradually standardised on "Welsh", the regiment continued to use "Royal Welch Fusiliers" to preserve its unique identity and heritage.

The regiment's title remained unchanged throughout the Second World War, appearing on official documents, service records, cap badges and military correspondence exactly as Royal Welch Fusiliers. Soldiers themselves proudly identified with the historic spelling, which became one of the regiment's most distinctive characteristics and a visible link to its origins in the late seventeenth century.

It was only in 2006, following the amalgamation of the Royal Welch Fusiliers with the Royal Regiment of Wales to form The Royal Welsh, that the modern spelling became part of the regiment's official title. For family historians, recognising the historic use of "Welch" can be particularly important when searching archival records, war diaries and military documents, as using the correct spelling often produces more accurate search results and helps distinguish the regiment from later formations.