cuz at that time america was with the allied powers and the reason why it enterd to the war was German and before that she was neutral and didn't have any problem with the other it used to supply weapons for other countries who were on war
The United States established a command economy for the duration of the war. The US converted factories made for the production of civilian needs to factories that manufacture war materials. These factories would be controlled by the government in order to keep running, providing a steady supply of necessary goods in order to keep the war effort going.
The major cause of the split in American politics in the early 1800s was over slavery, so a positive effect was that it forced the nation to deal with the slavery issue, while a negative effect was that it led to the Civil War.
