 The only survivors were "Ijaw swimmers" who knew how to disappear into the creeks.Kalu ordered his men to halt the offensive once the Nigerians had been pushed out of Port Harcourt and the surrounding countryside, but, had the 52nd Brigade continued the pursue the retreating Nigerians they could have most likely re-captured Bonny.Kalu quickly fell out of favor with the local Biafran civilian leaders in Port Harcourt due to his inability to clear the area of the Nigerian threat and, consequently, was relieved of his command of the 52nd Brigade by President Ojukwu and replaced by Maj. Joseph Achuzie on May 19, 1968.