The U.S. After the War

Countries that were or weren't a
part of the League of Nations.
Source.

After World War I, many countries were afraid of a war like World War I to happen again. Therefore the League of Nations was created so that if a war like that was to happen again, the League would stop it. However, the U.S. was not a part of it. The United States opposed the League of Nations because if they were to become a part of it, when a war broke out the U.S. would have to fight in the war which is what Americans didn't want. They were also afraid of anyone who was foreign and Communism. In order to alleviate some of their fears, the U.S. went to isolationism, and nativism.

During the war, production in the U.S. boomed. There were many jobs available that produced supplies for the soldiers fighting in Europe. Also, women were able to work in places where only men were allowed to work since they weren't allowed to fight. However, after the war was over, the soldiers went back to where they used to work, but the unemployment rate was still pretty high.
 
Also, after the war many Americans were afraid of Communism spreading. Communism is a form of government where the government controls everything. There is also no private property allowed. The government controls every TV channel and what is broadcasted in it, and also radio stations, controlling what is said on them. If Communism would come the United States, it would mean the end of Capitalism. 




United States Non-Interventionism
Source. 

After World War I, the United States became an isolationist country. They isolated themselves both economically, didn't trade with other countries, and also politically, by having a neutral stance in world affaires. They managed to achieve this by regulating immigration, in fear that foreigners would be a threat to American jobs and economy. They became isolationist because many Americans didn't want any more dead soldiers, their sons being the soldiers. However this plan proved to be ineffective because in 1929 the stock market crashed leading to the Great Depression. Also, by staying isolated during the events of World War II, the war came to United States instead of the United States going towards the war after the attack on Pearl Harbor.