Battlefield Earth

Factual error: Amongst the essential parts of a nuclear weapon's detonation mechanism is a radioactive isotope of tritium, which has a half life of just 12 1/2 years. The tritium in every nuke on earth has to be replaced every ten years or so. This is by no means unusual; there are other perishable parts including detonators made of conventional explosives which would be completely inert after a thousand years. After lying dormant with no maintenance at all for that amount of time the nuclear weapons the 'Man-animals' find would be big shiny paperweights and not much else.

Factual error: The cavemen Harrier pilots are shown using the hover mode frequently. Harriers, even with drop tanks as depicted in the film, can hover for at most 5-10 minutes, as the thrust required to keep the aircraft in the air without any lift consumes massive amounts of fuel and overheats the engine, and real-life Harrier pilots are instructed never to hover for long periods of time, unless absolutely necessary. The amount of time the cavemen spent hovering (hiding out of sight in a parking garage, sneaking up on the Psychlo gunships, etc.) would have easily caused their fuel to run dry.

Razvaluha

Plot hole: The facilities at Ft. Hood have working electricity to power the simulators, projectors, etc. even though it's been 1000 years, with no logical reason for the Psychlos to have kept the facility maintained, and the fact that the Psychlos should by rights have leveled the place when they invaded 1000 years before. Even automatic backup generators would have no fuel after 1000 years dormancy except for a nuclear system, which would still have required regular maintenance over a 1000 year interval to maintain automatic functionality.

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Trivia: John Travolta made the film with Franchise Pictures. A few years after the film, it was revealed in a court case that Franchise had fraudulently overstated the budget of Battlefield Earth by $21 million to scam investors. After losing the case, Franchise filed for bankruptcy, and Travolta fired his manager, who set up the deal with Franchise in the first place.

Chrissy: What if he's not dead?
Parson Staffer: Hope is an admirable quality, but foolish isn't.

Terl: Attention. This is Terl, your chief of security. Exterminate all man-animals at will, and happy hunting.

Ker: I don't know what you're so down about. You still get to be head of security, which, from what I can tell, is a pretty cushy job.
Terl: Well, I can assure you that I was not groomed since birth to have some cushy job that even a moron like you could perform. While you were still learning how to spell your name, I was being trained to conquer galaxies! To do anything less is a disgrace to my entire family line.

More quotes from Battlefield Earth

Chosen answer: It is residual radiation from atomic weapons used in an attempt to fight off the Psychlos.

Chosen answer: They teleported a gas drone into Earth's atmosphere. The drone flew around the entire world and dropped poison gas which killed Earth's population.

Grumpy Scot

Chosen answer: Huge robotic ships programmed to fly on a set course and drop poison gas.

Grumpy Scot

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