''Battlefield Earth'' may refer to one or more of the following:

* the 1982 [[Literature/BattlefieldEarth novel]] by Creator/LRonHubbard
* the 2000 [[Film/BattlefieldEarth film]] [[TheFilmOfTheBook based on the novel]], directed by Roger Christian and starring Creator/JohnTravolta and Barry Pepper

For the trope about Earth being a warzone, see EarthIsABattlefield.
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