WW1 in pictures: Poster women of World War One. Women were a vital tool in Britain's wartime imagery, appearing in government posters all over the country.

German troops in Finland during the Finnish Civil War, part of a series of conflicts spurred on by World War I. Red troops, both men and women, ready for deportation from Hango, in April of 1918.

For centuries women have followed armies, many of them soldiers’ wives, providing indispensable services such as cooking, nursing, and laundry—in fact, “armies could not have functioned as well, ...