Tipu Sultan ( Urdu:ٹیپو سلطان, Kannada : ಟಿಪ್ಪು ಸುಲ್ತಾನ್ ) (20 November 1750  – 4 May 1799), (Sultan Fateh Ali Khan Shahab) also known as the Tiger of Mysore, and Tipu Sahib, was a ruler of the Kingdom of Mysore. He was the eldest son of Sultan Hyder Ali of Mysore. Tipu introduced a number of administrative innovations during his rule, including his coinage, a new Mauludi lunisolar calendar, and a new land revenue system which initiated the growth of Mysore silk industry. Tipu expanded the iron-cased Mysorean rockets and wrote the military manual Fathul Mujahidin, considered a pioneer in the use of rocket artillery. He deployed the rockets against advances of British forces and their allies in their 1792 and 1799 Siege of Srirangapatna.