What were some of the key consequences of World War II, particularly for the United States?

After the First World War, European economy fell; it depended on German indemnities to pay off its debts to the US. US Wall Street financed a lot of damage repairs after the war to the Allied forces in Europe. However, Germany was in its own difficulties due to inflation and it could not pay the Allies. Since the Allies did not get an influx of money, it could not pay US, which eventually led to a recession in the US economy, leading to the Wall Street Crash in 1929. This was despite the Dawes arrangement. This crisis was the trigger for the Great Depression that lasted until the Second World War.