On August 18, 1920, Congress ratified the Nineteenth Amendment, giving women across the country the right to vote. This historic moment was largely the result of the work of activists and organizations advocating for universal voting rights. While these efforts started earlier, work for the amendment was the culmination of a twentieth-century women’s suffrage movement. This movement faced formidable political and social opposition and delay in moments of national concern like World War I. This set of primary sources—photos, advertisements, maps, and other documents—sheds light on that struggle toward the Nineteenth Amendment.