 Hyder Ali introduced the first iron cased rockets in warfare.At the Battle of Pollilur (1780) during the Second Anglo-Mysore War, Colonel William Baillie's ammunition stores are thought to have been detonated by a hit from one of Tipu Sultan's Mysorean rockets, which contributed to the British defeat.In the Third Anglo-Mysore War in 1792, there is mention of two rocket units fielded by Tipu Sultan, 120 men and 131 men respectively.