The Declaration of Independence is the usual name of a statement adopted by the Continental Congress on July 4, 1776, which announced that the thirteen American colonies, then at war with Great Britain, regarded themselves as thirteen newly independent sovereign states, and no longer a part of the British Empire. Instead they formed a new nation—the United States of America. John Adams was a leader in pushing for independence, which was unanimously approved on July 2. A committee of five had already drafted the formal declaration, to be ready when Congress voted on independence. The term "Declaration of Independence" is not used in the document itself. Adams persuaded the committee to select Thomas Jefferson to compose the original draft of the document, which Congress would edit to produce the final version. The Declaration was ultimately a formal explanation of why Congress had voted on July 2 to declare independence from Great Britain, more than a year after the outbreak of the American Revolutionary War. The national birthday, Independence Day, is celebrated on July 4, although Adams wanted July 2.