They formed in river valleys, that is where all of the first one's formed.
<span>One of the greatest changes in the United States was the most of the women had served in the workplace in one way or another during the war, when the men were off fighting. Many did not return to be housekeepers after the war, and some were competing with men returning home. Another change also had to do with the structure of the economy.</span>
Answer:
B) Many adults went off to war
Thirteen states were needed to approve a law.