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Because it involved all continents in some way and was fought in North America, Africa, Asia, and Europe. All of the major powers fought, and it holds the record for the war with the highest amount of casualities (30-60 million). It also introduced new ideas like Blitzkrieg and ended the era of the Battleship. Also, all of the remaining European Empires, and the Japanese Empire, crumbled after the war.

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16y ago
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Q: Why was World War 2 a big conflict?
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