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gunpowder was used as a flame thrower, it was shown too have a big effect on the enemies.
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Charlemagne was crowned emperor on Christmas day 800bce
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Buddhism was a religion and is still used in our current times
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Gregory became pope, meaning he would be pope until 604bce
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it was first made too be able too keep track of when Easter was coming up and occurred. They weren't planning for it too become a long term thing.