Political situation of Bangladesh Liberation War

Although East Pakistan accounted for a slight majority of the country's population, political power remained in the hands of West Pakistanis. Since a straightforward system of representation based on population would have concentrated political power in East Pakistan, the West Pakistani establishment came up with the "One Unit" scheme, where all of West Pakistan was considered one province. This was solely to counterbalance the East wing's votes.

After the assassination of Liaquat Ali Khan, Pakistan's first prime minister, in 1951, political power began to devolve to the President of Pakistan, and eventually, the military. The nominal elected chief executive, the Prime Minister, was frequently sacked by the establishment, acting through the President.

The East Pakistanis observed that the West Pakistani establishment would swiftly depose any East Pakistanis elected Prime Minister of Pakistan, such as Khawaja Nazimuddin, Muhammad Ali Bogra, or Huseyn Shaheed Suhrawardy. Their suspicions were further influenced by the military dictatorships of Ayub Khan (27 October 1958 – 25 March 1969) and Yahya Khan (25 March 1969 – 20 December 1971), both West Pakistanis. The situation reached a climax in 1970, when the Awami League, the largest East Pakistani political party, led by Sheikh Mujibur Rahman, won a landslide victory in the national elections. The party won 167 of the 169 seats allotted to East Pakistan, and thus a majority of the 313 seats in the National Assembly. This gave the Awami League the constitutional right to form a government. However, Zulfikar Ali Bhutto (a Sindhi and former Foreign Minister), the leader of the Pakistan Peoples Party, refused to allow Rahman to become the Prime Minister of Pakistan. Instead, he proposed the idea of having two Prime Ministers, one for each wing. The proposal elicited outrage in the east wing, already chafing under the other constitutional innovation, the "one unit scheme". Bhutto also refused to accept Rahman's Six Points. On 3 March 1971, the two leaders of the two wings along with the President General Yahya Khan met in Dhaka to decide the fate of the country. 

After their discussions yielded no satisfactory results, Sheikh Mujibur Rahman called for a nationwide strike. Bhutto feared a civil war, therefore, he sent his trusted companion, Dr. Mubashir Hassan. A message was convened and Mujib decided to meet Bhutto.[42] Upon his arrival, Mujib met with Bhutto and both agreed to form a coalition government with Mujib as Premier and Bhutto as President. However, the military was unaware of these developments, and Bhutto increased his pressure on Mujib to reach a decision. On 7 March 1971, Sheikh Mujibur Rahman (soon to be the prime minister) delivered a speech at the Racecourse Ground (now called the Suhrawardy Udyan). In this speech he mentioned a further four-point condition to consider at the National Assembly Meeting on 25 March:

• The immediate lifting of martial law.
• Immediate withdrawal of all military personnel to their barracks.
• An inquiry into the loss of life.
• Immediate transfer of power to the elected representative of the people before the assembly meeting 25 March.

He urged his people to turn every house into a fort of resistance. He closed his speech saying, "Our struggle is for our freedom. Our struggle is for our independence." This speech is considered the main event that inspired the nation to fight for its independence. General Tikka Khan was flown into Dhaka to become Governor of East Bengal. East-Pakistani judges, including Justice Siddique, refused to swear him in.

Between 10 and 13 March, Pakistan International Airlines cancelled all their international routes to urgently fly "government passengers" to Dhaka. These "government passengers" were almost all Pakistani soldiers in civilian dress. MV Swat, a ship of the Pakistan Navy carrying ammunition and soldiers, was hardbound in Chittagong Port, but the Bengali workers and sailors at the port refused to unload the ship. A unit of East Pakistan Rifles refused to obey commands to fire on the Bengali demonstrators, beginning a mutiny among the Bengali soldiers.