Simla Convention

The Simla Convention (Traditional Chinese: 西姆拉條約; Simplified Chinese: 西姆拉条约), officially the Convention Between Great Britain, China, and Tibet, was an ambiguous treaty concerning the status of Tibet negotiated by representatives of the Republic of China, Tibet and Great Britain in Simla in 1913 and 1914.

The Simla Convention provided that Tibet would be divided into "Outer Tibet" and "Inner Tibet". Outer Tibet, which roughly corresponded to Ü-Tsang and western Kham, would "remain in the hands of the Tibetan Government at Lhasa under Chinese suzerainty", but China would not interfere in its administration. "Inner Tibet", roughly equivalent to Amdo and eastern Kham, would be under the jurisdiction of the Chinese government. The convention with its annexes also defined the boundary between Tibet and China proper and that between Tibet and British India (with the latter coming to be known as the McMahon Line).

A draft convention was initialled by all three countries on 27 April 1914, but China immediately repudiated it. A slightly revised convention was signed again on 3 July 1914, but only by Britain and Tibet. The Chinese plenipotentiary, Ivan Chen, declined to sign it. The British and Tibetan plenipotentiaries then signed a bilateral declaration that stated that the convention would be binding on themselves and that China would be denied any privileges under the convention until it signed it.