Answer:
During World War I (WWI), many of the men in the labor force left to fight in the war, leaving a shortage of workers in many industries. In response to this shortage, many employers began hiring women to work in their factories and other industrial settings.
This shift towards hiring women was known as "Rosie the Riveter," a term that was popularized by a government campaign to encourage women to join the workforce. The campaign featured posters and other materials that depicted women performing traditionally male jobs, such as welding and operating machinery.