How did the feminist Elizabeth Cady Stanton and Susan B Anthony react to the passage of the fifteenth amendment?

Elizabeth Cady Stanton and Susan B. Anthony were deeply disappointed by the passage of the Fifteenth Amendment in 1870, which granted African American men the right to vote while excluding women of all races. They believed that the amendment's focus on race over gender betrayed the broader fight for equality. In response, they formed the National Woman Suffrage Association, advocating for women's suffrage and highlighting the interconnectedness of racial and gender equality. Their reaction marked a significant moment in the feminist movement, emphasizing the need for women's rights alongside racial justice.