The Carnatic Sultanate was a kingdom in South India between about 1690 and 1855, and was under the legal purview of the Nizam of Hyderabad, until their demise. They initially had their capital at Arcot in the present-day Indian state of Tamil Nadu. Their rule is an important period in the history of the Carnatic and Coromandel Coast regions, in which the Mughal Empire gave way to the rising influence of the Maratha Empire, and later the emergence of the British Raj. Borders The old province known as the Carnatic, in which Madras (Chennai) was situated, extended from the Krishna river to the Kaveri river, and was bounded on the West by Mysore kingdom and Dindigul, (which formed part of the Sultanate of Mysore). The Northern portion was known as the 'Mughal Carnatic', the Southern the 'Maratha Carnatic' with the Maratha fortresses of Gingee and Ranjankudi. Carnatic thus was the name commonly given to the region of Southern India that stretches from the East Godavari of Andhra Pradesh in the North, to the Maratha fort of Ranjangudi in the south (including the Kaveri River delta) and Coromandal Coast in the east to Western Ghats in the west. History With the decline of Vijayanagara Empire in 1646, the Hindu viceroys Nayaks, established in Madurai, Tanjore and Kanchi made themselves independent, only in their turn to become tributary to the kings of Golconda and Bijapur, who divided the Carnatic between them. Mughal Emperor Aurangzeb in 1692 appointed Zulfikhar Ali Khan as the first subahdar of the Carnatic with his seat at Arcot as a reward for his victory over the Marathas led by Rajaram. With the decline of the Mughal empire, Carnatic subah became an independent sultanate. The Carnatic Sultanate controlled a vast territory south of the Krishna river. The Nawab Saadatullah Khan I (1710–1732) moved his court from Gingee to Arcot. His successor Dost Ali (1732–1740) conquered and annexed Madurai in 1736. In 1740, the Maratha forces descended on Arcot. They attacked the Nawab, Dost Ali Khan, in the pass of Damalcherry. In the war that followed, Dost Ali, one of his sons Hasan Ali, and a number of prominent persons lost their lives. This initial success at once enhanced Maratha prestige in the south. From Damalcherry the Marathas proceeded to Arcot, which surrendered to them without much resistance. Chanda Sahib and his son were arrested and sent to Nagpur. The