The American Woman Suffrage Movement spanned from 1848 to 1920 and sought to expand voting rights to women. It began at the Seneca Falls Convention in 1848 where women and men demanded equality and the right for women to vote. Over the following decades, suffragists advocated state-by-state for women's suffrage and pushed for a constitutional amendment, facing opposition from those who felt women were too emotional or fragile. By the early 1900s, more women were joining the cause. After suffragists engaged in more militant tactics, the 19th Amendment was passed in 1920, guaranteeing all American citizens the right to vote regardless of sex.