Mysorean rockets were the first iron-cased rockets successfully deployed for military use. Hyder Ali, the 18th century ruler of Mysore, and his son and successor, Tipu Sultan used them effectively against the British East India Company during the 1780s and 1790s. Their conflicts with the company exposed the British to this technology, which was then used to advance European rocketry with the development of the Congreve rocket in 1805 https://en.wikipedia.org/wiki/Mysorean_rockets
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