August 4th 2014 marks 100 years since the outbreak of World War One. Millions of soldiers from Wales and the rest of the UK enlisted to fight in the conflict, which lasted for four years between 1914 and 1918.
Lights are being turned out across Wales this evening in an event marking one hundred years since Britain entered World War One.
A candlelit vigil is taking place at Llandaff Cathedral, with a service led by Archbishop of Wales Dr Barry Morgan. First Minister Carwyn Jones and the Duke and Duchess of Gloucester are amongst those attending.
People are being encouraged to switch out their lights between 10pm and 11pm and light a candle in remembrance for those who lost their lives in the Great War.
People across Wales are switching off their lights for an hour this evening and lighting a candle of remembrance.
ITV Wales correspondent Richard Morgan writes about his experience of researching the stories behind those killed in the Great War
All in one place: See some of ITV Wales's reports marking the centenary of the outbreak of the First World War here.