The Guardian Units of the Nation, also known as G.U.N., is an organization that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It is the military organization of the United Federation, encompassing army, navy, air force, and special forces branches. It is heavily involved in the war against Dr. Eggman's Eggman Empire, in defending the Federation, and also the world as a whole from more unusual threats such as the Black Arms or the Dark Gaia Creatures.