Answer:
Step-by-step explanation:
- it involved 32 nations, including the United States, and took the lives of over 20 million people.
- terrible new weapons that reflected the technological advances of the time—machine guns, poison gases, airplane bombers, and submarines.
- For many Americans, the war signaled an end to idealism and ushered in an era marked by hedonism, political corruption, and ruthless business practices