During one week in April 1918, 20,000 Grand Rapids women—half the city’s female population—registered for the war effort. One thousand registrars were trained to conduct a 30-minute interview with each woman. Each woman’s information was recorded on a government-issued 5x8 card. Unlike the male WWI registration cards, those from the woman’s nationwide registration are a data-rich resource. The men’s cards were saved; the women’s cards disappeared. Decades later, the women’s cards were discovered in the attic of the Grand Rapids Public Library. Historian Diana Barrett will share the story of the Women’s Defense Cards, the research they inspired, and new information that has been discovered beyond Grand Rapids. Co-sponsored by the Western Michigan Genealogical Society.