Answer:
1. The American Expeditionary Forces arrived in Europe in 1917 and helped turn the tide in favor of Britain and France, leading to an Allied victory over Germany and Austria in November 1918.
2. The war production effort brought immense changes to American life. As millions of men and women entered the service and production boomed, unemployment virtually disappeared. The need for labor opened up new opportunities for women and African Americans and other minorities.
Step-by-step explanation:
World War One was an awful war, but it has made us aware of what we are capable of, not just killing but uniting, working together, and being tough in hard times. There are so many lessons to be learned from every war that has ever happened, including WWI.