The colonies officially broke away from England when they declared independence via The Declaration of Independence of 1776.
The need for extraordinary and decisive action :D
Answer:
it was a multi-ethnic and multi-linguistic empire
The Bill of Rights contains the first ten amendments to the US Constitution.
After WWI and during the Great Depression the US tried to be an Isolationist nation. They put out tariffs so people would buy US (forgetting that the rest of the world was still devastated by WWI (economies included)).