In May 1967, Governor of the Eastern Region Lt. Colonel Emeka Ojukwu declared the region independent from the federation as a state called the Republic of Biafra, under his leadership. This declaration precipitated the Nigerian Civil War, which began as the official Nigerian government side attacked Biafra on July 6, 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 during the 30-month civil war range from one to three million. France, Egypt, the Soviet Union, Britain, Israel, and others were deeply involved in the civil war behind the scenes. Britain and the Soviet Union were the main military backers of the Nigerian government, with Nigeria utilizing air support from Egyptian pilots provided by Gamal Abdel Nasser, while France and Israel aided the Biafrans. The Congolese government, under President Joseph-Désiré Mobutu, took an early stand on the Biafran secession, voicing strong support for the Nigerian federal government and deploying thousands of troops to fight against the secessionists.