Analysis of information sources in references of the Wikipedia article "Conflito fronteiriço sino-indiano em 1967" in Portuguese language version.
Indeed, Beijing's acknowledgement of Indian control over Sikkim seems limited to the purpose of facilitating trade through the vertiginous Nathu-la Pass, the scene of bloody artillery duels in September 1967 when Indian troops beat back attacking Chinese forces.
(Indian) jawans trained and equipped for high-altitude combat used US provided artillery, deployed on higher ground than that of their adversaries, to decisive tactical advantage at Nathu La and Cho La near the Sikkim-Tibet border.
Cho La incident (1967) - Victorious: India / Defeated : China
