The Delhi Agreement was a trilateral agreement signed on 28 August 1973 between India, Pakistan and Bangladesh. and has been ratified only by India and Pakistan.  It allowed the repatriation of prisoners of war and interned officials detained in the three countries after the Bangladesh Liberation War in 1971. The deal has been criticized because Pakistan failed to bring Urdu spokesmen back to Bangladesh and did not hold accountable 195 senior military officials accused of violating behavior during the war.  The summit between Bhutto and Indra Gandhi opened in Simla at the set time. The Summit was held from 28 June to 2 July 1972. The objective of the agreement was to define the measures envisaged to normalize bilateral relations and settle mutual disputes through peaceful means and bilateral negotiations. Following a meeting between Qureshi and Chinese Foreign Minister Wang Yi, China issued a statement saying, “The Kashmir issue is a dispute that has been recreated in colonial history. It should be resolved in due form on the basis of the Charter of the United Nations, the relevant resolutions of the United Nations Security Council and bilateral agreements. On July 2, 1972, the two countries reached an agreement. The main clauses of the Simla agreement are that the “bilateral agreement” in the Chinese foreign minister`s statement destroyed Qureshi`s hopes that his all-time friend would further support Pakistan. Among the prisoners of war, 195 Pakistani military officers detained in India were identified as the main suspects of war crimes. Pakistan insisted that they be released as one of its main demands.
It urged several Muslim countries to hold back bangladesh`s recognition until the 195 officers were released.  India supported his repatriation to Pakistan. In the text of the agreement, Kamal Hossain, Minister of Foreign Affairs of Bangladesh, said that the treaty entered into force on August 8, 1973 and ended on July 1, 1974. As part of the agreement, UNHCR monitored the repatriation of citizens from Bangladesh and Pakistan. According to the UN, 121,695 Bengals have been relocated from Pakistan to Bangladesh. These included senior Bengali officials and military officers. 108,744 non-Bengali civilians and civil servants were transferred from Bangladesh to Pakistan.  India released 6500 Pakistani prisoners, most of them transported by train to Pakistan.  In 1974, General Niazi was the last Pakistani officer to be symbolically returned across the Wagah border.