Assam (ə'sæm,_æ-; ˈɔxɔm) is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of . The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur to the east; Meghalaya, Tripura, Mizoram and Bangladesh to the south; and West Bengal to the west via the Siliguri Corridor, a strip of land that connects the state to the rest of India. Assamese and Boro are the official languages of Assam, while Bengali is an additional official language in the Barak Valley.
Assam is known for Assam tea and Assam silk. The state was the first site for oil drilling in Asia. Assam is home to the one-horned Indian rhinoceros, along with the wild water buffalo, pygmy hog, tiger and various species of Asiatic birds, and provides one of the last wild habitats for the Asian elephant. The Assamese economy is aided by wildlife tourism to Kaziranga National Park and Manas National Park, which are World Heritage Sites. Dibru-Saikhowa National Park is famed for its feral horses. Sal tree forests are found in the state which, as a result of abundant rainfall, look green all year round. Assam receives more rainfall than most parts of India; this rain feeds the Brahmaputra River, whose tributaries and oxbow lakes provide the region with a distinctive hydro-geomorphic environment.
Etymology of Assam
The first dated mention of the region comes from Periplus of the Erythraean Sea (1st century) and Ptolemy's Geographia (2nd century), which calls the region Kirrhadia, apparently after the Kirata population. In the classical period and up to the 12th century, the region east of the Karatoya river, largely congruent to present-day Assam, was called Kamarupa, and alternatively, Pragjyotisha. Though a western portion of Assam as a region continued to be called Kamrup, the Ahom kingdom that emerged in the east, and which came to dominate the entire Brahmaputra valley, was called Assam (e.g. Mughals used Asham); and the British province too was called Assam.