The National Organisation of Cypriot Fighters (EOKA), a Greek Cypriot right-wing nationalist guerrilla organisation, began an armed campaign in support of the end of British colonial rule and the unification of Cyprus and Greece (Enosis) in 1955. Opposition to Enosis from Turkish Cypriots led to the formation of the Turkish Resistance Organisation (TMT) in support of the partition of Cyprus. The Cyprus Emergency ended in 1959 with the signature of the London-Zürich Agreements, establishing the Republic of Cyprus as a non-partitioned independent state separate from Greece.
Cyprus was a territory of the Ottoman Empire from the late 16th century until becoming a protectorate of the United Kingdom under nominal Ottoman suzerainty in the Cyprus Convention of 4 June 1878, following the Russo-Turkish War. In 1915, Cyprus was formally annexed into the British Empire after the Ottomans entered World War I on the side of the Central Powers against the British, and was initially governed by a military administration until a decade later in 1925 when it was proclaimed the Crown Colony of Cyprus. From the 1910s to 1950s, Greek Cypriots became increasingly dissatisfied with British rule and supportive of Enosis, the concept of political unification between Cyprus and Greece. Several unsuccessful offers made to Greece by the British to cede Cyprus in exchange for military concessions, and the noticeable lack of British investment on the island, caused a growing Cypriot nationalist movement.
On 1 April 1955, the EOKA insurgency began with 1 April Attacks. After a series of follow up incidents, the Governor General Sir John Harding declared a state of emergency on 26 November of that year. The British encountered great difficulty obtaining effective intelligence on EOKA as the majority of the Greek Cypriot population supported them. They were also hampered by a drain on manpower caused by the Suez Crisis and Malayan Emergency. Towards the end of the 1950s, the British enjoyed more success. Cyprus became an independent republic in 1960 with Britain retaining control of two Sovereign Base Areas, at Akrotiri and Dhekelia.
In January 2019, the British government agreed to pay £1 million to a total of 33 Cypriots who were allegedly tortured by British forces during the uprising. They included a woman, aged 16 at the time, who said she was detained and repeatedly raped by soldiers, and a man who lost a kidney as a result of his interrogation. The payout followed the declassification of government documents in 2012, although Foreign Office minister Alan Duncan stated that "the settlement does not constitute any admission of liability" but that "the government has settled the case in order to draw a line under this litigation and to avoid the further escalation of costs".