During his rule, Tippu Sultan laid the foundation for a dam where the famous Krishna Raja Sagara Dam across the river Cauvery was later built. He also completed the project of La! Bagh started by his father Haidar Ali, and built roads, public buildings, and ports along the Kerala shoreline. His trade extended to countries which included .Sri Lanka, Afghanistan, France, Turkey, and Iran. Under his leadership, the Mysore army proved to be a school of mili- tary science to Indian princes. The serious blows that Tippu Sultan inflicted on the British in the First and Second Mysore Wars affected their reputation as an invincible power. Dr. APJ Abdul Kalam, the current President of India, in his Tipu Sultan Shaheed Memorial Lecture in Bangalore on 30 November 1991, called Tippu Sultan the innovator of the world's first war rocket. Two of these rockets, captured by the British at Srirangapatna, are displayed in the Woolwich Museum Artillery in London. Most of Tippu Sultan's campaigns resulted in remarkable successes. He managed to subdue all the petty kingdoms in the south. He defeated the Marathas and the Nizams several times and was also one of the few Indian rulers to have defeated British armies.
Tippu Sultan had lost his sword in a war with the Nairs of Travancore in which he was defeated. The Maharaja, Dharma Raja, gave the sword to the Nawab of Arcot, from where the sword went to London. The sword was on display at the Wallace Collection, No.1 Manchester Square, London. At an auction in London in 2004, the industrialist-politician Vijay Mallya purchased the sword of Tippu Sultan and some other historical artifacts, and brought them back to India for public display after nearly two centuries.