 Complete the following phrase:  Initially, the Indo-Burmese border had been drawn based on surveys conducted under the Topographical Survey of British India as early as 1912, following the highest ridge from the Hkakabo Razi alt. ; the highest point in Myanmar at the junction with the Chinese border in the north, to the Chittagong Hills in Bangladesh according to a combination of ridges, watershed and highest crests. Later, during World War II, G.D.L. Millars diary recalls the escape of a party of 150 European, Indian and Kachin officials and civilians fleeing the advance of the Japanese in May 1942. They went from Putao Kachin to Margherita Assam via the Chaukan Pass, and followed the valley of the Noa-dihing river. Millar records that over a hundred miles of the Chaukan Pass, there was no trace of man either Lisu or any other tribe. The border negotiations with China that led to the 1962 