 Complete the following phrase:  Relations between the Greek and the Turkish states have been marked by alternating periods of mutual hostility and reconciliation ever since Greece won its independence from the Ottoman Empire in 1830. Since then, the two countries have faced each other in four major warsthe Greco-Turkish War 1897, the First Balkan War 1912-1913, the First World War 1914-1918, including the Greek genocide 1913-1922, and finally the Greco-Turkish War 191922, which were followed by the Greco-Turkish population exchange and a period of friendly relations in the 1930s and 1940s. Both countries entered NATO in 1952. Relations deteriorated again after the 1950s due to the 1955 Istanbul pogrom, the Cyprus issue, and the expulsion of the Istanbul Greeks in the 1960s, the 1974 Cypriot coup detat, immediately followed by the 