British accounts describe the use of the rockets during the third and fourth wars. During the climactic battle at Srirangapatna in 1799, British shells struck a magazine containing rockets, causing it to explode and send a towering cloud of black smoke with cascades of exploding white light rising up from the battlements. After Tipu's defeat in the fourth war the British captured a number of the Mysorean rockets. These became influential in British rocket development, inspiring the Congreve rocket, which was soon put into use in the Napoleonic Wars.