In 1914, representatives of China, Tibet and Britain negotiated a treaty in India: the Simla Convention. During the convention, the British tried to divide Tibet into Inner and Outer Tibet. When negotiations broke down over the specific boundary between Inner and Outer, the British demanded instead to advance their line of control, enabling them to annex 9,000 square kilometers of traditional Tibetan territory in southern Tibet i.e Tawang region, which corresponds to the north-west parts of modern Indian state of Arunachal Pradesh, while recognizing Chinese suzerainty over Tibet and affirming the latter's status as part of Chinese territory, with a promise from the Government of China that Tibet will not be converted into a Chinese province. Tibetan representatives signed without Chinese approval, more so as an act of defiance now that the Chinese army had left; after the collapse of Chinese authority in Tibet in 1912. China maintains that it was signed under British pressure;
