evidence: The Bhutanese decided to hold boundary talks with China in 1980 and in preparation, began gathering material from their own archives, as well as those available in India and the UK. Data on the Royal Bhutan Army (RBA) patrolling limits, administrative limits and local practices were also ascertained. It was only after this process that the Bhutanese established their claim lines that were plotted on the map that was approved by the members of the 68thsession of the National Assembly in 1989. In the process, Bhutan voluntarily shed territory, though its details were not immediately disclosed. For example, older maps showed the Kula Kangri mountain and its surrounding areas within Bhutan, but the new one showed them clearly in Tibetan territory. [...] In 1997, the king told the 75thsession of the Assembly that the two sides were back to discussing the exchange of the 495 sq km of the Pasamlung and Jakarlung Valleys with the western claims, that included the 89 sq km of Doklam. [vii]Thus the current dispute involves some 764 sq km since the Bhutanese had earlier voluntarily shed some 400 sq km in the north, along with Kula Kangri. [...] It was in the same meeting that Dasho Pema also disclosed, in response to a question about Kula Kangri being shown as part of Tibet, that "due to cartographic mistakes of the map in the olden days" the mountain was shown in Bhutan whereas it was actually "well inside Tibetan territory". [x]