The American Legion National Bylaws serve as the foundational document governing the organization's structure, operations, and policies. These bylaws ensure consistency, accountability, and adherence to the Legion's principles across all levels of the organization.

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Established in 1919, the Legion's bylaws have evolved over time to reflect the changing needs and challenges faced by veterans and their families. They provide a framework for the Legion's mission, which is to foster camaraderie among veterans, promote patriotism, and serve the nation.