with the beginning of the North Yemen Civil War in 1962 with the overthrow of Imam Badr and the setting of a new, Republican regime. While in the North, during the civil war, the pro-monarch and pro-republican forces fought for power, the South of Yemen was under British control. During the 1960s, the British sought to incorporate all of the Aden Protectorate territories into the Federation. On 18 January 1963, the Colony of Aden was incorporated against the wishes of much of the city's populace as the State of Aden and the Federation was renamed the Federation of South Arabia. Several more states subsequently joined the Federation and the remaining states that declined to join, mainly in Hadhramaut, formed the Protectorate of South Arabia. In 1963 fighting between Egyptian forces and British-led Saudi-financed guerrillas in the Yemen Arab Republic spread to South Arabia with the formation of the National Liberation Front (NLF), who hoped to force the British out of South Arabia. Hostilities started with a grenade attack by the NLF against the British High Commissioner on 10 December 1963, killing one person and injuring fifty, and a state of emergency was declared, becoming known as the Aden Emergency. In 1964, the new British government under Harold Wilson announced their intention to hand over power to the Federation of South Arabia in 1968, but that the British military would remain. In 1964, there were around 280 guerrilla attacks and over 500 in 1965. In 1966 the British Government announced that all British forces would be withdrawn at independence. In response, the security situation deteriorated with the creation of the socialist Front for the Liberation of Occupied South Yemen (FLOSY) which started to attack the NLF in a bid for power, as well as attacking the British. With the British being defeated and driven from Aden by the end of November 1967, earlier than had been planned by British Prime Minister Harold Wilson and without an agreement on the succeeding governance. Their enemies, the NLF, managed to seize power, with Aden itself under NLF control. The Royal Marines, who had been the first British troops to occupy Aden in 1839, were the last to leave. The Federation of South Arabia collapsed and Southern Yemen became independent as the People's Republic of South Yemen. Following this Yemen suffered from a highly fractured political landscape, which is the legacy of the regime of