The African Union came into existence in 2002 when it replaced the

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The African Union (AU) came into existence on July 9, 2002, replacing the Organisation of African Unity (OAU). The OAU had been established in 1963 in Addis Ababa, Ethiopia, with the primary aims of promoting unity and solidarity among African states, eradicating colonialism, and defending the sovereignty of its member states.

By the late 1990s, African leaders recognised the need for a more effective continental body that could address the challenges of the post-Cold War era, including conflict resolution, economic integration, and governance. The Constitutive Act of the African Union was adopted in 2000 at the Lome Summit (Togo) and came into force in 2001. The AU was formally launched in Durban, South Africa, in July 2002.

The African Development Bank (AfDB) is a financial institution that continues to exist alongside the AU. "Federation of African Unity" and "Organisation of African Community" are not real organisations. The OAU is the only body that the AU replaced.