Nigerian nationalism most serious threat to the Nigerian unity since Nigeria became independent in 1960, as other ethnic groups threatened that they too would also seek secession should Biafra successfully secede. Nigeria responded to the separatist threat with a military campaign against the Biafran government, resulting in the Nigerian Civil War from 1967 to 1970. The war ended with the defeat of the Biafran separatists. Between one and three million Nigerians died in the war. The 19th century did not witness the emergence of any political organization that could help in airing the grievances and expressing the aspirations of Nigerians on a
Guyana (1966–1970) Guyana (1966–1970) Guyana was a predecessor to the modern-day Republic of Guyana and an independent state that existed between 1966 and 1970. British rule ended on 26 May 1966, when Guyana was given independence from the United Kingdom by the Guyana Independence Act 1966, which transformed British Guiana into an independent Commonwealth realm or dominion, a sovereign constitutional monarchy with Elizabeth II, as Queen of Guyana. The monarch's constitutional roles were mostly delegated to the Governor-General of Guyana. The following governors-general held office: Elizabeth II did not reside in or visit Guyana during the time she was Queen of Guyana.