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It is said that a cook in ancient China found a mixture of sulfur, potassium nitrate, and charcoal was very flammable and would explode if enclosed in a small space (History of Fireworks). The first application of this technology was for entertainment. The Chinese are still the leaders in the production of fireworks. Once the recipe for black powder was perfected, they found that it was easily used as rocket fuel, and they made hand carved wooden rockets in the shape of a dragon in the sixth century (History of Fire Works).
These rockets shot rocket powered arrows from their mouths, and were used against the Mongol invaders of 1279...
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