During February 1953, the United Kingdom and Egypt concluded an agreement providing for Sudanese self-government and self-determination. The transitional period toward independence began with the inauguration of the first parliament in 1954. On 18 August 1955 a revolt in the army in Torit Southern Sudan broke out, which although quickly suppressed, led to a low level guerrilla insurgency by former Southern rebels, and marked the beginning of the First Sudanese Civil War. On 15 December 1955 the Premier of Sudan Ismail al-Azhari announced that Sudan would unilaterally declare independence in four days time. On 19 December 1955 the Sudanese parliament, unilaterally and unanimously, declared Sudan's independence. The British and Egyptian governments recognized the independence of Sudan on 1 January 1956. The United States was among the first foreign powers to recognize the new state. However, the Arab-led Khartoum government reneged on promises to southerners to create a federal system, which led to a mutiny by southern army officers that sparked seventeen years of civil war (1955–1972). In the early period of the war, hundreds of northern bureaucrats, teachers, and other officials, serving in the south were massacred.