A disputed Himalayan border was the main pretext for war Military_operation , but other issues played a role .

Unable to reach Arriving political accommodation on disputed territory along the 3,225 kilometre- ( 2,000 mile- ) long Himalayan border , the Chinese launched Process_start simultaneous offensives Attack in Ladakh and across the McMahon Line on 20 October 1962 .

The Tibetan Ganden Phodrang regime , which was then under administrative rule Control of the Qing dynasty , remained Temporary_stay the only Himalayan state free of British influence .