Welsh archives hold a vast collection of documents, letters, diaries, maps and photographs from the First World War and you can find many of these by searching the online catalogue.
This short film shows some of the great resources that are available in Welsh Archives regarding the First World War.
There are also some great external resources available:
Wales Remembers – a site providing news, events and signposting information for the commemoration of the centenary in Wales
Cymru 1914 – The Welsh Experience of the First World War – a digital archive of sources relating to the First World War as it affected Wales.
Wales at War – a project to collect the histories of the 40,000 or so Welsh men and women – soldiers, sailors, airmen, nurses and civilians, who lost their lives as part of the war effort in Wales