The situation soon attracted the attention of many other countries.
Thus the war later was not only between India and Pakistan, but many countries were involved in 1971 Indo Pakistani war (War of Liberation of Bangladesh) directly or indirectly.
In May, Indira Gandhi wrote to Nixon about the ‘carnage in East Bengal’ and the flood of refugees, burdening India.
After L K Jha (then the Indian ambassador to US) had warned Kissinger that India might have to send back some of the refugees as guerrillas, Nixon commented, ‘By God, we will cut off economic aid [to India].’ A few days later, when the US president said ‘the goddamn Indians’ were preparing for another war, Kissinger retorted ‘they are the most aggressive goddamn people around.’ (All Excerpts and Sources from 929 page long Volume XI of the Foreign Relations of the United States) US sympathized with Pakistan, because of various reasons.
Hearing this, on December 9, Nixon decided to send the aircraft carrier USS Enterprise into the Bay of Bengal to threaten India.
The plan was to Surround India from all four sides and force them to retreat and leave East Pakistan.
In a telegram sent to US Secretary of State Will Roger, on March 28, 1971, the staff of the US consulate in Dhaka complained, ‘Our government has failed to denounce the suppression of democracy. Our government has failed to take forceful measures to protect its citizens while at the same time bending over backwards to placate the West Pakistan dominated government…According to Najam Sethi, a well respected and honoured journalist from Pakistan, East Pakistan always complained that they received less development funds and less attention from the West Pakistan (Punjabi) dominating government.Bengalis in East Pakistan also resisted the adoption of Urdu as the state language.The article was written after a detail analysis of various sources.All the relevant and immediate sources are listed at the end of the Article.” Before 1971, Bangladesh used to be a part of Pakistan as East Pakistan.They believed China is preparing to open the Northern front which will slow down or completely stop the Indian advancement.In fact, the myth of Chinese activity was also communicated to Pakistan’s army to boost their moral, to keep their will to fight and hope alive.At this, US assured China that any action taken by Soviet Union will be countered by US to protect China.Pakistani army had somehow maintained their position and resisted Indian advancement.We, as professional public servants express our dissent with current policy and fervently hope that our true and lasting interests here can be defined and our policies redirected in order to salvage our nation’s position as a moral leader of the free world.’ This brought China in the picture.US needed help from China and the messenger was Pakistan.