The document fought for by the Anti-Federalists is The Bill of Rights. The Anti-Federalists were concerned about the potential for a strong central government to infringe on individual liberties and advocated for a Bill of Rights to protect those liberties.
The Articles of Confederation were the governing document before the Constitution, and the other options, the Preamble and the Gettysburg Address, are not directly related to the Anti-Federalist movement.
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