Scale of British war effort in World War One 8 November 2014 Last updated at 23:18 At the outbreak of World War One in 1914, no-one could have imagined the scale of the military operation and bloodshed to come. In 1922, the War Office published the 900-page Statistics of the Military Effort of the British Empire during the Great War detailing the vast figures involved and how they changed between 1914 and 1918. The data covers all aspects of the conflict, from the arming, feeding and supplying of the military machine to the human cost of those serving a nation at war. World War One Centenary: iWonder guides How do you fix a face that has been blown off by shrapnel? The dazzle camouflage on ships to confuse the enemy What did WW1 really do for women? How did so many soldiers survive the trenches? What did WW1 sound like? Britain's teenage soldiers Discover more iWonder guides