Tanzania joined the United Nations on 14 December 1961, just five days after Tanganyika gained independence from British colonial rule on 09 December 1961. The nation's admission to the UN was a critical milestone, signaling its entry into the international community as a sovereign state. As a member of the UN, Tanzania became actively involved in global diplomacy, lending its voice to issues affecting developing nations, particularly in Africa. In 1964, Tanganyika merged with Zanzibar to form the United Republic of Tanzania, and the country's UN membership continued under this new designation. Over the years, Tanzania has been a strong advocate for decolonization, racial equality, and sustainable development, often serving as a leader among non-aligned nations. The country has also contributed significantly to peacekeeping missions, hosting refugees, and promoting regional stability through its involvement in the African Union and other international initiatives. Tanzania's membership in the UN reflects its commitment to multilateralism and global cooperation.