The event that led to the establishment of the United States as a nation was the American Revolutionary War, culminating in the Declaration of Independence in 1776. This war arose from growing tensions between the American colonies and British rule over issues like taxation and representation. After a prolonged struggle, the colonies won independence following the defeat of Britain. The successful rebellion prompted the creation of a new government based on Enlightenment ideals of liberty and democracy. The eventual ratification of the U.S. Constitution in 1788 solidified this new nation’s framework and principles, paving the way for its future evolution.