For the first time women were encouraged to join the workforce to help win the war. As millions of men were mobilised for military service, British women began to do many jobs that had been the preserve of men. They worked in industry, on the land, in the civil service. But tens of thousands were employed in munitions factories. It was long, hard and dangerous work. Using the BBC archive we hear from women who worked as 'Munitionettes' Photo: British recruitment posters urging women to work during World War I. (Photo by Hulton Archive/Getty Images)