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The Chittagong Hill Tracts (Bengali: পার্বত্য চট্টগ্রাম, romanized: Parbotto Chottogram), often shortened to simply the Hill Tracts and abbreviated to CHT, are a group of districts within the Chittagong Division in southeastern Bangladesh, bordering India and Myanmar (Burma). Covering 13,295 square kilometres (5,133 sq mi), they formed a single district until 1984, when they were divided into three districts: Khagrachari District, Rangamati Hill District, and Bandarban District.
Topographically, the Hill Tracts are the only extensively hilly area in Bangladesh. It was historically settled by many tribal refugees from Burma Arakan in the 16th century and now it is settled by the Jumma people. Today, it remains one of the least developed parts of Bangladesh.The Chattogram Hill Tracts along with Sikkim, Tawang, Darjeeling, Bhutan, and Sri Lanka, constitute some of the remaining abodes of Buddhism in South Asia.