Timeline:

Before the war

• March 9: Workers of Chittagong port refuse to unload weapons from the ship 'Swat'.
  
• March 19: Nearly 50 people die as Pakistan Army opens fire on demonstrators at Jaydevpur.
  
• March 24: Pakistan Army opens fire on Bengali demonstrators in Syedpur, Rangpur and Chittagong. More than a thousand people are killed.
  
  

Events during the WarMarch

• March 25: Pakistan Army starts Operation Searchlight in Dhaka and rest of the country, attacking general civilians, political activists, students, and Bengali members of armed forces and police
• March 26: This is Bangladesh's official Independence Day.
• March 31: Kushtia resistance begins.

April

• April 2: Jinjira massacre.
• April 6: The Blood Telegram
  
• April 24: Formation of Bangladesh Action Committee at Coventry, UK by non-resident Bangladeshis.

May

• May 20:The Chuknagar massacre takes place at Khulna where the Pakistan army kills nearly 10 thousand people
  
  

July

• July 11–17: Sector Commanders Conference 1971.
  
  

August

• August 1: The Concert for Bangladesh in Madison Square Garden, New York by George Harrison and friends.
• August 30: Pakistan Army crackdown on Dhaka guerrillas.[14]
  
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September

• September 5: Battle of Goahati, Jessore. 
  
• September 28: Bangladesh Air Force starts functioning.

October

• October 31 to November 3: Battle of Dhalai: Indian attack from Tripurainto East Pakistan to stop Pakistani cross-border shelling.
  
  

November

• November 9: Six small ships constitute the first fleet of Bangladesh Navy.
• November 21: Bangladesh Armed Forces is formed.
  
• November 22 to December 13, and sporadic fighting to December 16:Battle of Hilli: Indian attack on Bogra in East Pakistan.

December (The 1971 Bangladesh-Indo-Pakistan War)

• December 3: Bangladesh Air Force destroys Pakistani oil depots. Pakistani air attacks on India result in India declaring war on Pakistan.
• Enterprise is deployed by the USA in the Bay of Bengal to intimidate Indian Navy.
  
• December 13: Soviet Navy deploys a group of warships to counter USSEnterprise.
• December 14: Selective genocide of Bengali nationalist intellectuals. Liberation of Bogra.
  
• December 16: End of the Bangladesh Liberation War. Mitro Bahini takes Dhaka. East Pakistan Army surrenders to Mitro Bahini represented byJagjit Singh Aurora of the Indian Army faction of the military coalition.
  

Freedom of Bangladeshi people.

• December 22: The provisional government of Bangladesh arrives in Dhaka from exile.