Nathu La and Cho La clashes

The Nathu La and Cho La clashes, sometimes referred to as Indo-China War of 1967, Sino-Indian War of 1967, Second Sino-Indian War, 1967 China–India standoff, were a series of border clashes between China and India alongside the border of the Himalayan Kingdom of Sikkim, then an Indian protectorate.

The Nathu La clashes started on 11 September 1967, when China's People's Liberation Army (PLA) launched an attack on Indian posts at Nathu La, and lasted till 15 September 1967. In October 1967, another military duel took place at Cho La and ended on the same day.

According to independent sources, India achieved "decisive tactical advantage" and managed to hold its own against and push back Chinese forces. Many PLA fortifications at Nathu La were destroyed, where the Indian troops drove back the attacking Chinese forces. The competition to control the disputed borderland in Chumbi Valley is seen as a major cause for heightening the tensions in these incidents. Observers have commented that these clashes indicated the decline of 'claim strength' in China's decision to initiate the use of force against India, and stated that India was greatly pleased with the combat performance of its forces in the Nathu La clashes, seeing it as a sign of striking improvement since its defeat in the 1962 Sino-Indian War.