The Spanish Civil War (1936-1939) was a pivotal moment in twentieth-century history. Drawing thousands from around the world to join the International Brigades in defence of the Spanish Republic. Amongst these volunteers were hundreds of Welsh men and women, their actions reflecting a deep commitment to social justice and anti-fascism.

The valleys and towns of South Wales, deeply affected by unemployment and poverty felt a strong sense of solidarity. The volunteers included: miners, teachers, writers and trade unionists driven by the hardships of the interwar years in Wales. Although diverse in job role, they had a shared determination to oppose the rise of fascism across Europe.

Among the most prominent individuals was Lewis Jones of Clydach Vale. Having started work in the mines at just 12 years old, Jones was actively involved in the strike that led to the Tonypandy Riots of 1910–1911. As both a miner and an activist, his leadership and literary contributions embodied the spirit of the Welsh volunteers in Spain. Welsh Brigaders served bravely on the front lines in famous battles such as Jarama and Ebro. Their experiences were marked by both camaraderie and tragedy, with many making the ultimate sacrifice. The legacy of these brave men and women lives on in Wales, celebrated through memorials, literature, and annual commemorative events that pay tribute to their courage and commitment.

The story of Welsh volunteers in Spain remains a testament to internationalism and the enduring fight for equality. It stands as a powerful reminder of the impact individuals from small communities can have on global struggles for justice.

It should be noted that the volunteers who joined the international brigade, in Spain, were allocated ‘Brigade ID numbers’ not ‘service numbers’.