Used to corroborate: named after the Niger Delta; formed 27 August 1991 from Bendel; Anioma State proposal; Asaba chosen as capital; Mid-West 1963–76, Bendel 1976–91; borders; peoples (Urhobo, Isoko, Anioma Igbo, Ijaw, Itsekiri, Olukumi); rivers; vegetation; minerals; petroleum.