World War I prompted changes in women's roles and empowerment. Women contributed to the war effort through volunteer work and joining the military. The passing of the 19th Amendment in 1920 granted women's suffrage and the right to vote. Newly empowered, women began working in politics, the workforce as nurses, teachers and more. The 1920s saw the rise of the flapper, representing a free-spirited, independent woman through fashion and behavior. However, social changes were not fully accepted and some values challenged traditional American culture. The decade pioneered new frontiers for women's culture and roles in society.