Also lets remember the heroes of the U. S. war of Independence: John Adams, John Hancock, John Jay, Paul Revere, George Washington and many others.
For a review, I'd recommend to take a look at this chronological timeline of the events that lead the United States to gain their independence from England.
On January 10, 1776, Thomas Paine published a political pamphlet entitled Common Sense In the ensuing months, before the United States as a political unit declared its independence, several states individually declared their independence...
...On July 2, 1776, Congress declared the independence of the United States; two days later, on July 4, it adopted the Declaration of Independence, which date is now celebrated as the US independence day. Although the bulk of delegates signed the Declaration on that date, signing continued over the next several months because many members weren't immediately available. (source)
And let's thank the soldiers that are fighting abroad so that we can enjoy of this 4th of July. Happy Independence Day!!