http://www.bharat-rakshak.com/MISSILES/History.html

"The British were greatly impressed by the Mysorean rockets using iron tubes. At the end of war more then 700 rockets and sub systems of 900 rockets were captured and sent to England. William Congreve thoroughly examined the Indian specimens to reverse engineer and making its copies that were later used successfully in naval attack on Boulogne[5] (1806), siege of Copenhagen[6] (1807) and also against Fort Washington (New York) during the American Independence War, that is recounted as, rockets' red glare in the U.S. National Anthem, "The Star Spangled Banner."[7]"

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