The 19th Amendment to the United States Constitution established equal voting rights for men and women. Prior to the 19th Amendment, most states prohibited women from voting in political elections, according to Scholastic's History of Women's Suffrage.
The 19th Amendment was ratified in 1920. The women's rights movements throughout the nation beginning in the 1830s were largely responsible for the creation and approval of the 19th Amendment, states History of Women's Suffrage.
Initially, President Woodrow Wilson didn't support the amendment, but he changed his position after many suffragist parades and vigils and following New York's passage of women's suffrage legislation in 1917, according to the Charters of Freedom, an exhibit of the National Archives. The 19th Amendment passed on a three-fourths rule with Tennessee being the 36th state to ratify it.