The American women's suffrage movement spanned from 1848 to 1920, beginning at the Seneca Falls Convention where the Declaration of Sentiments demanded equal rights for women, including the right to vote. While the 15th Amendment granted black men the vote in 1870, it disappointed many suffragists. Divisions emerged over strategies, but the movement reunited and pursued passing a constitutional amendment. Under leaders like Susan B. Anthony and Alice Paul, suffragists utilized various tactics, resulting in tensions. Their efforts succeeded when Tennessee ratified the 19th Amendment in 1920, granting women the right to vote nationwide.