The document discusses the roles of the US, Soviet Union, and China in Bangladesh's 1971 liberation war. The US supported Pakistan and sent naval ships to the Bay of Bengal. The Soviet Union was a strong ally of India and Bangladesh, signing a treaty with India and vetoing resolutions against them at the UN. China supported Pakistan and sent military experts to train Pakistani forces. Ultimately, the involvement of these superpowers impacted the outcome of the war and Bangladesh's independence.