The Getty Images Gallery has selected the images from its Hulton Archive, each telling its own story and forming a wider narrative on the history of photography for its 'Jewels of the Archive' exhibition.
100 years on, the wonders of 21st-century technology now allow us to see these amazing pictures of the conflict in breathtaking full colour, giving us a much keener sense of what it was actually like to be there.
Lance Corporal John Thomas was awarded the Victoria Cross after risking his life during World War One to obtain key battle information. But these letters reveal he thought about deserting just months earlier.
Walter Satterthwaite, pictured, from Letchworth, Hertfordshire died of blood loss in 1963 after surgeons amputated his leg which was in chronic pain since it was paralysed on the Western Front in 1917.