The People's Liberation Army defeated the Tibetan army in a battle at Chamdo in 1950 and Lhasa recognized Chinese sovereignty over Tibet in 1951. The Indian army asserted control of Tawang at this time, overcoming some armed resistance and expelling its Tibetan administrators. In 1954, China and India concluded the Five Principles of Peaceful Coexistence under which India acknowledged Chinese sovereignty in Tibet. Indian negotiators presented a frontier map to the Chinese that included the McMahon Line and the Chinese side did not object. At this time, the Indian government under Prime Minister Nehru promoted the slogan "Hindi-Chini bhai-bhai" (India and China are brothers).