The last six months have witnessed a proliferation of incidents along the 2,520-mile (4,057-kilometer) Sino-Indian frontier. Nearly a hundred have been recorded, including no fewer than 65 incursions by China’s People’s Liberation Army in just one sector – the evocatively-named Finger Area, a 2.1-square-kilometer salient in the Indian state of Sikkim, which shares a 206-kilometer border with Tibet.