evidence: Bhutan and China have disputes over territory in the north and in the west in the Himalayas. [...] India and Bhutan signed a special treaty in 1949 that takes Delhi's security concerns into account. A revised treaty in 2007, gave Thimphu more freedom in areas of foreign policy and military purchases. Hundreds of Indian soldiers have been stationed inside Bhutan and officials say they offer training to Bhutanese troops. Its military headquarters is in the western town of Haa, about 20km from Doklam.