Tungabhadra River in the context of "Krishna River"

South India, also known as Southern India or Peninsular India, is the southern part of the Deccan Peninsula in India encompassing the states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu and Telangana as well as the union territories of Lakshadweep and Puducherry, occupying 19.31% of India's area (635,780 km or 245,480 sq mi) and 20% of India's population. It is bound by the Bay of Bengal in the east, the Arabian Sea in the west and the Indian Ocean in the south. The geography of the region is diverse, with two mountain ranges, the Western and Eastern Ghats, bordering the plateau heartland. The Godavari, Krishna, Kaveri, Penna, Tungabhadra and Vaigai rivers are important non-perennial sources of water. Chennai, Bengaluru, Hyderabad, Coimbatore and Kochi are the largest urban areas in the region.

The majority of the people in South India speak at least one of the four major Dravidian languages: Telugu, Tamil, Kannada and Malayalam. During its history, a number of dynastic kingdoms ruled over parts of South India, and shaped the culture in those regions. Major dynasties that were established in South India include the Cheras, Cholas, Pandyas, Pallavas, Satavahanas, Chalukyas, Hoysalas, Rashtrakutas and Vijayanagara. European countries entered India through Kerala and the region was colonized by Britain, Portugal and France.

The Vijayanagara Empire, also known as the Karnata Kingdom, was a late medieval Hindu empire that ruled much of southern India. It was established in 1336 by the brothers Harihara I and Bukka Raya I of the Sangama dynasty, belonging to the Yadava clan of Chandravamsa lineage.

The empire rose to prominence as a culmination of attempts by the southern powers to ward off Muslim invasions by the end of the 13th century. At its peak in the early 16th century under Krishnadevaraya, it subjugated almost all of Southern India's ruling dynasties and pushed the Deccan sultanates beyond the Tungabhadra-Krishna River doab region, in addition to annexing the Gajapati Empire (Odisha) up to the Krishna River, becoming one of the most prominent states in India. The empire's territory covered most of the lands of the modern-day Indian states of Karnataka, Andhra Pradesh, Tamil Nadu, Goa, and some parts of Telangana, Maharashtra and Kerala.

Hampi or Hampe (Kannada: [hɐmpe]), also referred to as the Group of Monuments at Hampi, is a UNESCO World Heritage Site located in the town of Hampi in Vijayanagara district, east-central Karnataka, India. Hampi predates the Vijayanagara Empire; it is mentioned in the Ramayana and the Puranas of Hinduism as Pampa Devi Tirtha Kshetra. Hampi continues as a religious centre, with the Virupaksha Temple, an active Adi Shankara-linked monastery and various monuments belonging to the old city.

Hampi was the capital of the Vijayanagara Empire from 1336 to 1565 (as Vijayanagara), when it was abandoned. It was a fortified city. Chronicles left by Persian and European travellers, particularly the Portuguese, say that Hampi was a prosperous, wealthy and grand city near the Tungabhadra River, with numerous temples, farms and trading markets. Hampi-Vijayanagara is estimated to be the world's second-largest city by 1500, after Beijing, and probably India's richest at that time, attracting traders from Persia and Portugal. The Vijayanagara Empire was defeated by a coalition of Muslim sultanates; its capital was conquered, pillaged and destroyed by Muslim armies in 1565, after which Hampi remained in ruins.

The Vakataka dynasty (IAST: Vākāṭaka) was an ancient Indian dynasty that originated from the Deccan in the mid-3rd century CE. Their state is believed to have extended from the southern edges of Malwa and Gujarat in the north to the Tungabhadra River in the south as well as from the Arabian Sea in the west to the edges of Chhattisgarh in the east. They were the most important successors of the Satavahanas in the Deccan and contemporaneous with the Guptas in northern India.

Little is known about Vindhyashakti (r. 250–270), the founder of the family. Territorial expansion began in the reign of his son Pravarasena I. It is generally believed that the Vakataka dynasty was divided into four branches after Pravarasena I. Two branches are known, and two are unknown. The known branches are the Pravarapura-Nandivardhana branch and the Vatsagulma branch. Gupta Emperor Chandragupta II married his daughter into the Vakataka royal family and, with their support, annexed Gujarat from the Saka Satraps in 4th century CE. The power vacuum left by the Vakatakas were filled by that of the Chalukyas of Badami in the Deccan region. The Vakatakas are noted for having been patrons of the arts, architecture and literature. They led public works and their monuments are a visible legacy. The rock-cut Buddhist viharas and chaityas of Ajanta Caves (a UNESCO World Heritage Site) were built under the patronage of Vakataka king, Harishena.

The Chola dynasty (Tamil: [t͡ʃoːɻɐr]) was a Tamil dynasty originating from Southern India. At its height, it ruled over the Chola Empire, an expansive maritime empire. The earliest datable references to the Chola are from inscriptions dated to the 3rd century BCE during the reign of Ashoka of the Maurya Empire. The Chola empire was at its peak and achieved imperialism under the Medieval Cholas in the mid-9th century CE. As one of the Three Crowned Kings of Tamilakam, along with the Chera and Pandya, the dynasty continued to govern over varying territories until the 13th century CE.

The heartland of the Cholas was the fertile valley of the Kaveri River. They ruled a significantly larger area at the height of their power from the latter half of the 9th century till the beginning of the 13th century. They unified peninsular India south of the Tungabhadra River and held the territory as one state for three centuries between 907 and 1215 CE. Under Rajaraja I and his successors Rajendra I, Rajadhiraja I, Rajendra II, Virarajendra, and Kulothunga Chola I, the empire became a military, economic and cultural powerhouse in South Asia and Southeast Asia.

Western Ganga was an important ruling dynasty of ancient Karnataka in India which lasted from about 350 to 999 CE. They are known as "Western Gangas" to distinguish them from the Eastern Gangas who in later centuries ruled over Kalinga (modern Odisha and northern Andhra Pradesh). The general belief is that the Western Gangas began their rule during a time when multiple native clans asserted their freedom due to the weakening of the Pallava empire in South India, a geo-political event sometimes attributed to the southern conquests of Samudra Gupta. The Western Ganga sovereignty lasted from about 350 to 550 CE, initially ruling from Kolar and later moving their capital to Talakadu on the banks of the Kaveri River in modern Mysore district.

After the rise of the imperial Chalukyas of Badami, the Gangas accepted Chalukya overlordship and fought for the cause of their overlords against the Pallavas of Kanchi. The Chalukyas were replaced by the Rashtrakutas of Manyakheta in 753 CE as the dominant power in the Deccan. After a century of struggle for autonomy, the Western Gangas finally accepted Rashtrakuta overlordship and successfully fought alongside them against their foes, the Chola Dynasty of Tanjavur. In the late 10th century, north of Tungabhadra river, the Rashtrakutas were replaced by the emerging Western Chalukya Empire and the Chola Dynasty saw renewed power south of the Kaveri river. The defeat of the Western Gangas by Cholas around 1000 resulted in the end of the Ganga influence over the region.

Rajaraja I (Middle Tamil: Rājarāja Cōḻaṉ; Classical Sanskrit: Rājarāja Śōḷa; 3 November 947 – January/February 1014), also known as Rajaraja the Great, was a Chola emperor who reigned from 985 to 1014. He was known for his conquests of southern India and the Anuradhapura kingdom of Sri Lanka, as well as increasing Chola influence across the Indian Ocean. Rajaraja's birth name is variously given as Arul Mozhi Varman

Rajaraja's empire encompassed vast territories, including regions of the Pandya country, the Chera country, and northern Sri Lanka. He also extended his influence over strategic islands such as Lakshadweep, Thiladhunmadulu atoll, and parts of the Maldives in the Indian Ocean. His conquests were not limited to the south; he also launched successful campaigns against the Western Gangas and the Western Chalukyas, extending Chola authority as far as the Tungabhadra River. In the east, Rajaraja faced fierce opposition from the Telugu Chola king Jata Choda Bhima over control of Vengi. This region held significant strategic importance due to its access to resources and trade routes. The conflict between the two rulers intensified as they vied for dominance in the region, resulting in significant battles and shifting allegiances.