Mitro Bahini (meaning Allied forces in Bangla) was a military force composed of Bangladesh Army (as part of Mukti Bahini) and the Indian Army in December 1971 during the Bangladesh Liberation War. The alliance provided the final blow to already weakened Pakistan Army which surrendered thirteen days after the formation of the alliance. This article is about the Bengali language. ... Official flag of Bangladesh Army Bangladesh Army, or BÄnglÄdesh ShenÄ BÄhini (BÄnglÄ: বাà¦à¦²à¦¾à¦¦à§à¦¶ সà§à¦¨à¦¾ বাহিনà§) in Bangla, is a branch of Bangladesh Armed Forces. ... Liberation War commemoration poster Mukti Bahini (Bangla: মà§à¦à§à¦¤à¦¿ বাহিনà§) (Liberation Army), was a guerilla force which fought against the Pakistan Army during the Bangladesh War of Independence in 1971. ... The Indian Army (à¤à¤¾à¤°à¤¤à¥à¤¯ सà¥à¤¨à¤¾ Hindi: Bhartiya Sena) is the land force of the Military of India and has the prime responsibility of conducting land-based warfare. ... 1971 is a common year starting on Friday (click for link to calendar). ... The Bangladesh Liberation War (two other names are also used occasionally) refers to an armed conflict between West Pakistan (now Pakistan) and East Pakistan (now Bangladesh) that lasted for roughly nine months in 1971. ... Pakistan Army Coat of Arms Pakistan Army is the branch of the Pakistan Military responsible for land based military operations. ...