A major impetus for Pakistan's development of nuclear weapons was the effects of the Indo-Pakistani war of 1971, which led to the loss of East Pakistan (now Bangladesh) in the Bangladesh Liberation War, and the surrender of the Pakistan Eastern Command of approximately 93,000 as prisoners of war (POWs) to India. Eventually, these POWs were repatriated to Pakistan under the provisions of the Simla Agreement but the decisive defeat left deep scars in Pakistan's civil society. Given the failure of the country's foreign policy to gather support from long-standing allies, such as the United States, Turkey, and China, Pakistan's physical existence seemed to depend upon its own initiative.