The 19th Amendment to the U.S. Constitution prohibits the states and the federal government from denying the right to vote to women. But it took protests to secure its passage on Aug. 18, 1920. Tennessee was the final vote needed to ratify the 19th Amendment guaranteeing women the right to vote.
Even then, the extension of voting rights was not evenly extended to women of color. In many states, women of color were barred from voting for decades more.