Just a high level list of the various types of weapons we humans have developed for the sole purpose of killing our fellow man:
Ancient weapons;medieval weapons;American Civil War weapons;World War I weapons;World War II weapons;Korean War weapons;Vietnam War weapons; aircraft weapons;antiaircraft weapons;artillery;flamethrowers; firearms;bullpup firearms;multiple barrel firearms;pistols;submachine guns;shotguns;assault rifles;service rifles of national armies;sniper rifles;recoilless rifles;battle rifles;carbines;machine guns;grenade launchers;blow forward firearms;delayed blowback firearms;martial arts weapons;Mêlée weapons;premodern combat weapons;missiles;rockets;nuclear weapons;torpedoes;airplane missiles.
