Which document announced American independence from Britain?

The Declaration of Independence is the document that formally announced American independence from Britain. Drafted by Thomas Jefferson in 1776, it outlined the colonies' grievances against King George III and articulated the principles of individual liberty and government by consent of the governed. This pivotal document signified the colonies' decision to break free from British rule and establish themselves as a separate, self-governed entity. It emphasized the Enlightenment ideals of equality and rights, making a compelling case for the separation and justifying the quest for independence to both domestic and international audiences.

The other documents listed do not serve the same purpose: The Articles of Confederation established the framework for the U.S. government post-independence, the Bill of Rights enumerated individual freedoms and rights within the framework of the U.S. Constitution, and The Federalist Papers were written to promote the ratification of the Constitution, outlining the principles of governance rather than proclaiming independence.