evidence: Sixty years ago, on November 21, China declared a unilateral ceasefire against India bringing to an end the month-long India-China border war. Of the territory it occupied in the war, China retained control of Aksai Chin in the western sector of the disputed border but, although it took control of almost all of the North East Frontier Agency (NEFA) or today’s Arunachal Pradesh in the eastern sector, it withdrew 20 kilometers north of the McMahon Line. The pullback of Chinese forces north of the McMahon Line suggested that China was perhaps not serious about pressing its claims in the eastern sector. However, since the mid-1980s, it has robustly asserted claims over some 90,000 square kilometers of territory in India’s northeast, which roughly approximates the Indian state of Arunachal Pradesh or what China calls Southern Tibet. [...] Since the mid-1980s, China has been reasserting rights over Arunachal Pradesh. Why the renewed interest in this territory? During the last few months, Beijing’s propaganda has reiterated that the entire Arunachal Pradesh is part of "Southern Tibet."