When the Imo River Became the Border: How the 1976 Adjustment Split Igbo Communities
In 1976, the Federal Military Government set up the Justice Mamman Nasir Boundary Adjustment Commission to settle state-line disputes. The commission chose the Imo River as the natural border between Imo and Rivers States, even though many Igbo-speaking clans on both banks shared the same ancestry. Asa/Ukwa largely remained on the Imo side (later Abia State), but Obigbo (now called Oyigbo) and several Ndoki-linked villages south of the river were placed under Rivers State. The Supreme Court affirmed this change in the A-G Imo State vs. A-G Rivers State ruling. More than a cartographic shift, the adjustment severed long-standing cultural ties: kinship networks, marketplaces, farmlands and traditional institutions were suddenly divided. Today, many people in Obigbo still trace their heritage to Asa, Ukwa and Ndoki, showing how administrative lines can shape identity and history.
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