President Obama's first inauguration was held during the depths of the Great Recession. The situation was dire; the economy had lost nearly 3.6 million jobs in 2008 and was shedding jobs at a nearly 800,000 per month rate when he took office.
Answer: Americans started to want to eliminate waste and corruption, they saw this as a powerful element to grow the country.
Examples: support of worker compensation, child labor laws, minum wage legislation, right to vote for women, etc.
Hope this helps^^
If we are talking about the second world war, then then answer would be that the Chinese kept the Japanese busy fighting them, and in turn, about 800,000 of their troops. This gave the Americans, who were the main force against the Japanese during this time, a little breathing room with which to continue military operations.
Hope this answered your question.
