On 29 August 1972, the two chief negotiators Parmeshwar Narain Haksar (India, Parmeshwar Narain Haksar) and Aziz Ahmed of Pakistan signed the final agreement between India and Pakistan, the summit between Indian Prime Minister Indira Gandhi and Pakistani President Zulfikar Ali Bhutto. The Delhi Agreement on the Return of War and Civilian Internees is a tripartite agreement between these states, signed on 28 August 1973. The agreement was signed by Kamal Hossain, the Foreign Minister of the Government of Bangladesh, Sardar Swaran Singh, the Indian Minister of Foreign Affairs and Aziz Ahmed, Minister of State for Defence and Foreign Affairs of the Pakistani government.    What the Simla Agreement did not obtain for India could have been achieved by the 1973 Delhi Agreement signed by India, Pakistan and Bangladesh. (iii) Withdrawals will begin on the effective date of this agreement and will be concluded within 30 days.  The Simla agreement reads as a communiqué rather than a peace agreement with a country that had waged war on India. Nothing in the agreement has put Pakistan in a state of good behaviour in the future. It also contained some ridiculous expectations, such as the clause that required both governments to “take all measures within their power to prevent hostile propaganda against each other.” The agreement is the result of the two countries` determination to “end the conflict and confrontation that have so far weighed on their relations.” He designed the steps to be taken to further normalize mutual relations and also defined the principles that should govern their future relations.   It appears that a tacit agreement on the release of Pakistani prisoners of war was reached in early 1972, since Bhutto overturned the death sentence of Sheikh Mujibur Rehman on 8 January 1972. The sheikh took over as Prime Minister of Bangladesh on 10 January 1972. The United States declared Bangladesh sovereign on April 4, 1972. This laid the groundwork for the Shimla agreement.
However, Pakistan officially recognized Bangladesh on 22 February 1974 and China on 31 August 1974. The agreement did not prevent relations between the two countries from deteriorating until the armed conflict, the last time during the 1999 Kargil war.