 After staging these guerrilla attacks that caused the Nigerians to suffer mass casualties, the 63rd Brigade soldiers slipped back into Biafran held territory with only minimal damage.After Owerri was captured by two battalions of Nigerian soldiers, Kalu was made commander of the Biafran 14th Division and given strict orders in a letter written to him by President Ojukwu.In the letter Ojukwu states "Your role in the Port Harcourt disaster is still fresh in the minds of people.