Megalith

Megalith may refer to any of the following:
 * Megalith (facility), the Erusian weapon of mass destruction that had the capability to shoot down asteroids in orbit
 * Megalith (mission), the 18th and final campaign mission in Ace Combat 04: Shattered Skies, dedicated to destroying this facility
 * Rex Tremendae, the song that plays during the cutscene immediately prior to this mission
 * Megalith -Agnus Dei-, the song that plays during the first part of this mission
 * Operation Judgement Day, the final ISAF operation of the Second Usean Continental War, dedicated to destroying this facility
 * Megalith defense squadron, the squadron defending this facility during Operation Judgement Day
 * Fortress Intolerance, a facility that featured many similarities to the Megalith facility