Assam is a state of India in the north-eastern region. Located south of the eastern Himalayas, Assam comprises the Brahmaputra and the Barak river valleys along with the Karbi Anglong and the North Cachar Hills with an area of 30,285 square miles (78,438 km²). Assam is surrounded by six of the other Seven Sister States: Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura and Meghalaya. Geographically Assam and these states are connected to the rest of India via a narrow strip of land in West Bengal called the Siliguri Corridor or "Chicken's Neck".Assam shares international borders with Bhutan and Bangladesh; and cultures, peoples and climate with South-East Asia – important elements in India’s Look East policy. Assam became a part of the British India after the British occupied the region following the First Anglo-Burmese War of 1824–1826.