context: In May 1967, the Eastern Region declared independence as a state called the Republic of Biafra, under the leadership of Lt. Colonel Emeka Ojukwu. The Nigerian Civil War began as the official Nigerian government side (predominated by soldiers from the North and West) attacked Biafra (Southeastern) on 6 July 1967 at Garkem. The 30 month war, with a long siege of Biafra and its isolation from trade and supplies, ended in January 1970. Estimates of the number of dead in the former Eastern Region are between 1 and 3 million people, from warfare, disease, and starvation, during the 30-month civil war.
question: తూర్పు నైజీరియా స్వాతంత్ర్యం ఎప్పుడు ప్రకటించింది?
answers: May 1967