On August 26, 1920, the nineteenth amendment, permitting women the right to vote, became law. Suffrage for women was first proposed during the Seneca Falls Women's Rights Convention in 1848. The nineteenth amendment was endorsed by the United States Senate on June 4, 1919, and sent to the states for ratification. Wisconsin was one of the first states to ratify the amendment.
The Library of Congress's American Memory has a large collection of resources relating to women's fight to gain the vote. Milwaukee Public Library also has a variety of material available.