Mar 07, 1971: Sheikh Mujibur Rahman declared that, "The current struggle is a struggle for independence", in a public meeting attended by almost a million people in Dhaka.

Mar 25, 1971: After several days of strikes and non-co-operation movements, the Pakistani military cracked down on Dhaka on the night of this day. Sheikh Mujibur Rehman of the Awami League was arrested by Paki forces and taken to West Pakistan. Under Gen Tikka Khan's command, the military carried out a murderous assault on Dacca University, hotbed of the Bangladeshi liberation struggle, and the Mukti Bahini on the night of March 25, 1971, killing hundreds of youths. The military carried out similar attacks in other parts of East Pakistan, killing thousands more.
"March 26: National Day & Independence Day Of Bangladesh

March 26, 1971: East Pakistan had officially seceded from Pakistan on this day, when a major in the army declared independence of Bangladesh on behalf of Mujibur Rehman.
On this day of 1971, Army of West Pakistan waged a war on East Pakistan (now Bangladesh)."

Mar 27, 1971: Prime Minister Indira Gandhi expressed full support of her government for the independence struggle of the people of East Pakistan.
"BANGLADESH LIBERATION WAR
a.k.a. Indo-Pak War of 1971

Apr 17, 1971: Exiled leaders of Awami League formed a provisional government."

April 28, 1971: On this day, General Manekshaw (Chairman of the Chiefs of Staff Committee) was asked to go into East Pakistan. Exiled East Pakistan army officers and members of the Indian Intelligence immediately started using the Indian refugee camps for recruitment and training of Mukti Bahini guerrillas."
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Sep 28, 1971: The official date of formation of the Bangladesh Air Force (BAF). BAF was formed with all officers and airmen of Bengali origin serving in the Pakistan Air Force prior to the war.
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Oct 08, 1971: Bangladesh Air Force (BAF) was launched formally by the Government on this day.

Nov 23, 1971: On this day, Yahya Khan declared a state of emergency in all of Pakistan and told his people to prepare for war.
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Dec 03, 1971: The war began with Operation Chengiz Khan, Pakistani air attacks on 11 Indian airbases on this day."

Dec 04-05, 1971: Indian Navy attacked Karachi's port on the night of 4–5 December, using missile boats, sinking Pakistani destroyer PNS Khyber and minesweeper PNS Muhafiz; besides other huge losses.
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Dec 04-05, 1971: Indian Navy attacked Karachi's port on the night of 4–5 December, using missile boats, sinking Pakistani destroyer PNS Khyber and minesweeper PNS Muhafiz; besides other huge losses.
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Dec 06, 1971: India recognized East Pakistan as Bangladesh.

Dec 08-09, 1971: On the night of 8–9 December, the Indian missile boats attacked the Karachi port, resulting in further destruction of reserve fuel tanks and the sinking of three Pakistani merchant ships.
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Dec 08-09, 1971: On the night of 8–9 December, the Indian missile boats attacked the Karachi port, resulting in further destruction of reserve fuel tanks and the sinking of three Pakistani merchant ships.

Dec 09, 1971: Pakistani submarine PNS Hangor sank the Indian frigate INS Khukri in the Arabian Sea, resulting in a loss of 18 officers and 176 sailors."

Dec 14, 1971: Being on the brink of defeat, the Pakistani Army systematically killed a large number of Bengali doctors, teachers and intellectuals, etc. killing over a million of innocent people.

Dec 16, 1971: Lieutenant-General A. A. K. Niazi, supreme commander of Pakistani Army in East Pakistan, surrendered to the Allied Forces (Mitro Bahini) represented by Lieutenant General Jagjit Singh Arora of Indian Army at the surrender. India and Bangladesh gain victory.

Jan 10, 1972: SHEIKH MUJIBUR RAHMAN returned to the newly independent Bangladesh as its President after spending over nine months in prison in Pakistan.

Jan 11, 1972: East Pakistan renamed itself Bangladesh on this day.

Jan 12, 1972: Sheikh Mujibur Rehman came to Power as President of Bangladesh.

Mar 19, 1972: After the independence of Bangladesh as a result of the liberation was with Pakistan, Bangladesh and India signed a 25 year treaty of peace and friendship on this day.

Jul 02, 1972: About 90,000 Pakistani prisoners of war (POWs) were released by India only after the negotiation and signing of the Simla Agreement on this day.

Feb 22, 1974: On this day, Organization of the Islamic Conference summit began in Lahore, Pakistan. 37 countries attended and 22 heads of state and governments participated. It also recognized Bangladesh.