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In page The Good, the Bad and the Ugly:

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Although not fighting in the war, the three gunslingers gradually become entangled in the battles that ensue (similar to The Great War, a film that screenwriters Luciano Vincenzoni and Age & Scarpelli had contributed to).[6] An example of this is how Tuco and Blondie blow up a bridge to disperse two sides of the battle. They need to clear a way to the cemetery and succeed in doing so. It is also seen in how Angel Eyes disguises himself as a union sergeant so he can attack and torture Tuco to get the information he needs, intertwining himself in the battle in the process.[citation needed]