Woman suffrage in the United States was achieved gradually, at state and local levels, during the 19th century and early 20th century, culminating in 1920 with the passage of the Nineteenth Amendment to the United States Constitution, which provided: “The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of sex.”
The Seneca Falls Convention of 1848 formulated the demand for women’s suffrage in the United States of America and after the American Civil War (1861–1865) agitation for the cause became more
prominent. In 1869 the proposed Fifteenth Amendment to the United States Constitution, which gave the vote to black men, caused controversy as women’s suffrage campaigners such as Susan B. Anthony and Elizabeth Cady Stanton refused to endorse the amendment, as it did not give the vote to women. Others, such as Lucy Stone and Julia Ward Howe however argued that if black men were enfranchised, women would achieve their goal. The conflict caused two organizations to emerge, the National Woman Suffrage Association, which campaigned for women’s suffrage at a federal level as well as for married women to be given property rights, and the American Woman Suffrage Association, which aimed to secure women’s suffrage through state legislation.