Fourth Anglo-Mysore War
As part of the campaign to extend the rule of the British East India Company, the Fourth Anglo-Mysore War broke out in 1798 against the Sultan of Mysore, Tipu Sultan. Arthur's brother Richard ordered that an armed force be sent to capture Seringapatam and defeat Tipu. During the war, rockets were used on several occasions. Wellesley was defeated by Tipu's Diwan, Purnaiah, at the Battle of Sultanpet Tope. Quoting Forrest,