Biography of Richard Wain from Penarth, Glamorgan, who won the Victoria Cross for his heroic actions at the Battle of Cambrai in the First World War, aged only 20. Also traces in detail the history of the Tank Corps and its contribution to the winning of the war, looking at personnel training and the development of tanks.

Cofiant Richard Wain, Penarth, sir Forgannwg, a enillodd Groes Fictoria am ei wrhydri ym Mrwydr Cambrai yn ystod y Rhyfel Byd Cyntaf, pan nad oedd ond 20 oed. Olrheinir yn fanwl hefyd hanes Corfflu'r Tanciau Arfog, a'i gyfraniad tuag at ennill y rhyfel, gan edrych ar hyfforddiant y llu dynol a'r datblygiadau ym maes tanciau.