Peninsular India in the context of Hyderabad, Telangana

Pamban Island (Tamil: பாம்பன் தீவு, pāmpaṉ tīvu), also known as Rameswaram Island, is an island located between peninsular India and Sri Lanka. It forms part of the Rameswaram taluk in the Ramanathapuram district of the Indian state of Tamil Nadu. It is the largest island in Tamil Nadu by area and the principal town in the island is the pilgrimage centre of Rameswaram.

With a land area of 3,287,263 km (1,269,219 sq mi) consisting of diverse ecosystems, India has many rivers systems and perennial streams. The rivers of India can be classified into four groups – Himalayan, Deccan, Coastal, and Inland drainage. The Himalayan rivers, mainly fed by glaciers and snow melt, arise from the Himalayas. The Deccan rivers system consists of rivers in Peninsular India, that drain into the Bay of Bengal and the Arabian Sea. There are numerous short coastal rivers, predominantly on the West coast. There are few inland rivers, which do not drain into sea.

Most of the rivers in India originate from the four major watersheds in India. The Himalayan watershed is the source of majority of the major river systems in India including the three longest rivers–the Ganges, the Brahmaputra and the Indus. These three river systems are fed by more than 5000 glaciers. The Aravalli range in the north-west serves the origin of few of the rivers such as the Chambal, the Banas and the Luni rivers.

Pulakeshin II (IAST: Pulakeśin; r. 609–642), popularly known as Immaḍi Pulakeśi, was the Chālukyan emperor from c. 609 to 642. During his reign, the Chalukya empire expanded to cover most of the Deccan region in peninsular India.as per the inscription of Shanka Basadi at Basti-Bana Pulakeśi another name was "Ereyamma".

A son of the Chalukya monarch Kirttivarman I, Pulakeshin overthrew his uncle Mangalesha to gain control of the throne. He suppressed a rebellion by Appayika and Govinda, and decisively defeated the Kadambas of Banavasi in the south. The Alupas and the Gangas of Talakadu recognized his suzerainty. He consolidated the Chalukya control over the western coast by subjugating the Mauryas of Konkana. His Aihole inscription also credits him with subjugating the Latas, the Malavas, and the Gurjaras in the north.