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Violence: Repeated, harrowing violence (mostly related to war): explosions, gunfire, bayoneting, stabbing; weapons include flamethrowers, cannons, automatic weapons, tanks, swords, grenades, missiles; are bodies thrown and exploded; grisly images include a head dropping on one soldier, heroes stabbing enemies, Japanese suicides by grenades, burning bodies, a tank rolling over a body, and Marines killed by "friendly fire" from a Navy ship; a body is discovered in a corral by kids (the body is viewed from above, at a distance).
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Sex: A joke about "masturbation papers" is played on a young Marine.
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Language: Repeated use of "f--k" (30+), as well as frequent other profanity ("s--t," "jackass," "a--hole," "hell," "damn"); thematic and repeated pejorative references to Ira's Native American idenity ("redskin," "squaw," "wigwam"); derogatory reference to "A-rabs."
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Consumerism: Flag-raisers are treated as commercial "product," so the issue is thematic.
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Drinking, drugs and smoking: Frequent cigarette smoking (soldiers smoke incessantly, except when in battle); hard, sad drinking (Ira drinks to get drunk, then stumbles, cries, and acts out his frustrations).