There is no evidence that Betsy Ross sewed the first U.S. flag. The story didn't even flutter forth from her relatives until 1870.
George Washington did not toss a dollar across the Potomac. Even if he did toss something, the dollar didn't come into being until after the U.S. gained independence.
Francis Scott Key did not write our national anthem. He penned the words then set them to an old English drinking song. It did not become our national anthem until 1931.
Most of the midnight ride of Paul Revere was accomplished by other horsemen. It was Samuel Prescott, in fact, who carried the warning to Concord.
The Declaration of Independence was not approved on July 4, 1776. Only John Hancock, for the assembly, signed it that day. The other signatures were made on August 2.
George Washington wasn't the first U.S. President. John Hanson was the president of the Congress of the Confederation and carried the title of president of the U.S., as did eight men after him.
"Yankee Doodle" is not an American song. It was a British ditty designed to harass ragtag colonists during the French and Indian War.