Dr APJ Abdul Kalam, the former President of India, in his Tipu Sultan Shaheed Memorial Lecture in Bangalore (30 November 1991), called Tipu Sultan the innovator of the world's first war rocket. Two of these rockets, captured by the British at Srirangapatna, were displayed in the Royal Artillery Museum in London. According to historian Dr Dulari Qureshi Tipu Sultan was a fierce warrior king and was so quick in his movement that it seemed to the enemy that he was fighting on many fronts at the same time. Tipu managed to subdue all the petty kingdoms in the south. He was also one of the few Indian rulers to have defeated British armies.