Tamil Nadu (; Tamil: [ˈtamiɻ ˈnaːɽɯ] (listen), abbr. TN) is a state in southern India. It is the tenth largest Indian state by area and the sixth largest by population. Its capital and largest city is Chennai. Tamil Nadu is the home of the Tamil people, whose Tamil language—one of the longest surviving classical languages in the world—is widely spoken in the state and serves as its official language. The state lies in the southernmost part of the Indian peninsula, and is bordered by the Indian union territory of Puducherry and the states of Kerala, Karnataka, and Andhra Pradesh, as well as an international maritime border with Sri Lanka. It is bounded by the Western Ghats in the west, the Eastern Ghats in the north, the Bay of Bengal in the east, the Gulf of Mannar and Palk Strait to the south-east, and the Indian Ocean in the south. The at-large Tamilakam region that has been inhabited by Tamils was under several regimes, such as the Sangam era rulers of the Chera, Chola, and Pandya clans, the Pallava dynasty, and the later Vijayanagara Empire, all of which shaped the state's cuisine, culture, and architecture. After the fall of the Kingdom of Mysore, the British colonised the region and administered it as part of the Madras Presidency, headquartered at the city of Madras, now known as Chennai. After India's Independence in 1947, the Madras State came into existence, whose borders were linguistically redrawn by the States Reorganisation Act, 1956, losing territory to Kerala, Karnataka and Andhra Pradesh. The state was renamed as Tamil Nadu in 1969. It is home to a number of historic buildings, multi-religious pilgrimage sites, hill stations and three World Heritage Sites.The economy of Tamil Nadu is the second-largest in India, with a gross state domestic product (GSDP) of ₹24.85 lakh crore (US$310 billion) and has the country's 11th-highest GSDP per capita of ₹225,106 (US$2,800). It ranks 11th among all Indian states in human development index. Tamil Nadu is the most urbanised state in India, and one of the most industrialised states; the manufacturing sector accounts for more than one-third of the state's GDP. Its tourism industry is the largest among the Indian states. The Tamil film industry plays an influential role in the state's popular culture.

Cuddalore ( (listen)) is the city and headquarters of the Cuddalore District in the Indian state of Tamil Nadu. Situated south of Chennai, Cuddalore was an important port during the British Raj. While the early history of Cuddalore remains unclear, the city first rose to prominence during Pallavas and Medieval Cholas' reign. After the fall of Cholas, the town was ruled by various dynasties like Pandyas, Vijayanagar Empire, Madurai Nayaks, Thanjavur Nayaks, Thanjavur Marathas, Tipu Sultan, French and the British Empire. Cuddalore was the scene of the Seven Years' War and the Battle of Cuddalore in 1758 between the French and British. It has been a part of independent India since 1947. During the 2004 Indian Ocean earthquake, and the subsequent tsunamis generated, Cuddalore was one of the affected towns, with 572 casualties. Apart from fishing and port-related industries, Cuddalore houses chemical, pharmacological and energy industries in SIPCOT, an industrial estate set up by the state government. The city is administered by municipal corporation covering 101.6 km2 . It had a population of 308,781 in 2011. Cuddalore is a part of the Cuddalore legislative assembly constituency, a part of the Cuddalore Lok Sabha constituency. There are 25 schools, two arts and science colleges and two engineering colleges in the city. There is one government hospital, six municipal maternity homes, and 42 other private hospitals that take care of the citizens' healthcare needs. Roadways are the primary means of transportation, while the town also has rail connectivity. The nearest airport is Chennai International Airport, located 200 km (120 mi) away from the city, and another local airport is located in the district at Neyveli township is Neyveli Airport. The nearest seaport is Cuddalore Port where it handles small cargo ships, and the construction of port entry is underway. The closest major seaport is Karaikal port, located 100 km (62 mi) away from the town. Cuddalore is famous for educational institutions and medical establishments.