International communities played a significant role during the Liberation War of Bangladesh in 1971. They provided diplomatic, humanitarian, political, military, moral, and media support to Bangladesh's cause for independence from Pakistan. This included recognizing Bangladesh as an independent country, providing aid to refugees, advocating for Bangladesh's cause globally, offering military assistance, raising awareness through media coverage, and coordinating efforts through international organizations. The combined efforts of international communities helped raise awareness, build pressure, and support Bangladesh in achieving its independence.