What is federalism? What has been the U.S. experience of federalism? Why?

Federalism is the combining of a general government and a regional government in single political system. Whenever America meets with another country to discuss topics it is considered American Federalism. The United States experiences this because we are always looking for new opportunity.

The U.S.'s main policy at the beginning of the war was the policy of isolationism. This meant that the U.S. would stay away from war and be neutral. However, even though they weren't fighting then, they would still help out the Allies (England and France.) We, knowing the result of the war, know that this policy did not last long when the U.S. lost its final straw and joined.