Opposition and its Consequences: Women Work for Peace How did some women mobilize themselves prior and during WWI? Web Link â 1 Web Link â 2 Web Link â 3 Web Link â 4 VFT MENU Some American women also opposed the war. Before the war, a number of leading American feminists, including reformer Jane Addams, formed the Womenâs Peace Party and, with pacifist women from other countries, the Womenâs International League for Peace and Freedom. Jeannette Rankin, the first woman to serve in the U.S. House of Representatives, voted against the declaration of war. When America joined the war, groups like the National American Woman Suffrage Association supported Americaâs war objectives.