During the Second Anglo-Mysore War, Hyder Ali, the ruler of the Sultanate of Mysore, deployed his advanced metal cylinder rockets, which turned the tide of the battle in his favor. These rockets were more accurate and powerful than the rockets used by the British forces, and they caused significant damage to the enemy troops and equipment. As a result, Hyder Ali was able to inflict heavy losses on the British forces and force them to withdraw from the battlefield. This success led to the widespread use of rockets in warfare and inspired the development of the Congreve rockets by the British.