The war had a dramatic impact on women. The sudden appearance of large numbers of women in uniform was easily the most visible change. The military organized women into auxiliary units with special uniforms, their own officers, and, amazingly, equal pay. By 1945, more than 250,000 women had joined the Women's Army Corps (WAC), the Army Nurses Corps, Women Accepted for Voluntary Emergency Service (WAVES), the Navy Nurses Corps, the Marines, and the Coast Guard. Most women who joined the armed services either filled traditional women's roles, such as nursing, or replaced men in non-combat jobs. During the first world war, the first demonstations were held to give women the right to vote.
Women also substituted for men on the home front. For the first time in history, married working women outnumbered single working women as 6.3 million women entered the work force during the war. The war challenged the conventional image of female behavior, as "Rosie the Riveter" became the popular symbol of women who abandoned traditional female occupations to work in defense industries. Social critics had a field day attacking women. Social workers blamed working mothers for the rise in juvenile delinquency during the war.
<span>After the development of a steam-powered locomotive in the mid-1800s, the laying of new rail lines grew quickly. This led to further development of transportation, ultimately cars and planes. </span>
