World War I caused the involvement of a great many American women in the nation's workforce. This advanced the cause of the cause of the women's suffrage movement. Women were granted voting rights in the United States in 1920. The participation of women in helping the war effort was a significant cause that led to the passage of the 19th Amendment.
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During World War I, around 2 million men had volunteered for service and nearly 3 million more had been drafted into service. With all those men being deployed into military roles, there was a great need on the home front for civilian workers. The demand for workers was filled by women. Women in the workforce in the USA increased from less than 25% of working age women prior to the war to more than a third (and perhaps almost half) of working age women by the end of the war.
The wartime efforts of women in the United States contribute much to the movement for advancing women's rights and opportunities in this country.
