Start by looking at The Long Long Trail (
www.1914-1918.net).
The details for the 13th Battalion, Royal Welsh Fusiliers states:
13th (Service) Battalion (1st North Wales)
Formed at Rhyl on 3 September 1914 by the Denbigh and Flint TF Associations, but transferred to the Welsh National
Executive Committee on 10 October 1914. November 1914 : came under orders of 128th Brigade, 43rd Division
at Llandudno. 28 April 1915 : formation became the 113th Brigade, 38th (Welsh) Division.
Moved to Winchester in August 1915 and landed in France in December 1915.Using the links on the top right of the page, navigate to the 38th (Welsh) Division.
In 1918 they took part in the following conflicts:
1918
The Battle of Albert+
The Battle of the Bapaume+
The battles marked+ are phases of the First Battles of the Somme 1918
The Battle of Havrincourt^
The Battle of Epehy^
The Battle of Beaurevoir^
The Battle of Cambrai^ in which the Division captured Villers-Outreaux
The battles marked^ are phases of the Battles of the Hindenburg Line
The Battle of the Selle**
The Battle of the Sambre**
The battles marked** are phases of the Final Advance in Picardy
Now it's just a matter of which battle was ongoing on the date he died!