The War Office records held by the National Archives include daily war diaries compiled by all the British Army units serving on the Western Front 1914-18. These archives comprise approximately 1.5 million pages of written diaries, orders, maps and records. Building on the success of high-profile citizen science projects such as Galaxy Zoo, Planet Hunters and Old Weather, the Imperial War Museum has partnered with the Zooniverse, at Oxford University, to build a citizen history platform that will transcribe these papers and uncover the stories held within the diaries. Describes the design and development of the diary interface, results from preliminary testing with Zooniverse citizen scientists and talks about experiences of building a large-scale citizen history project. Presented by Jim O’Donnell at: The Museums Computer Group 'Museums on the Web' conference 2013 (UKMW13) https://twitter.com/search?q=%23ukmw13 Tate Modern, 15 November 2013. The theme for UKMW13 was ‘Power to the people’. The Museums Computer Group: connecting, supporting, inspiring museum technology professionals