Well, this is a vague question. However, I'll assume that you meant specifically the problems after the First World War given the category the question is in.
We can start with the Great Depression, as probably the single most blatant problem in the Postwar United States. That particular topic is its own can of worms, however.
To be honest, however, that was really the only major issue. Granted, thousands of people lost their jobs even before the Depression set in due to returning Soldiers wanting their old jobs back and employers being quite happy to fire the underpriveleged minorities that they hired in place of men who went off to war, but there were very few serious domestic issues between 1918 and the Great Depression.
They did not see how a war in Europe affected the United States and were much more concerned with problems at home.
the war affected it greatly
Debt.
suburbanization
The Spanish-American War and the Sinking of the Maine
It helped reunite the nation after the civil war!! time of solving the South's post-war problems
They did not see how a war in Europe affected the United States and were much more concerned with problems at home.
I think it has affected us in many aspects.
The Roarin' Twenties was right after the war... because doughboys (us soldiers) came back the Roarin' Twenties caused the Great Depression
the war affected it greatly
It was affected because they needed food and the us helped them
USA became a free country
What was the direct cause of the war with mexico
It affected by the way they grew there crops
The Korean War was the FIRST war in US History in which they were "Officially Integrated" into the US Military forces.
In post-war Germany, apparently there were none. See the link below. slate.msn.com
Debt.