The Dooars or Duars are the alluvial floodplains in eastern-northeastern India and southern Bhutan that lie south of the outer foothills of the Himalayas and north of the Brahmaputra River basin. This region is about 30 km (19 mi) wide and stretches over about 350 km (220 mi) from the Teesta River in West Bengal to the Dhansiri River in Udalguri district of Assam. The region forms the gateway to Bhutan. It is part of the Terai-Duar savanna and grasslands ecoregion.

Bhutan, officially the Kingdom of Bhutan, is a landlocked country in South Asia situated in the Eastern Himalayas between China in the north and India in the south. With a population of over 727,145 and a territory of 38,394 square kilometres (14,824 sq mi), Bhutan ranks 133rd in land area and 160th in population. Bhutan is a constitutional monarchy with a king as the head of state and a prime minister as the head of government. Vajrayana Buddhism is the state religion and the Je Khenpo is the head of the state religion.