On July 15, 1974, a band of Greek Cypriot nationalists formed EOKA B, advocating Enosis (Union) with Greece and, backed by the Greek military junta in Athens, staged a coup against the Cypriot President and Archbishop Makarios. An ex-EOKA man, Nikos Sampson was appointed president. On July 20, Turkey—using its guarantor status arising from the trilateral accords of the 1959–1960 Zürich and London Agreement—invaded Cyprus without any resistance from the British forces based on the island, occupied 37% of the northern part and expelled the Greek population. Once again, war between Greece and Turkey seemed imminent, but actual war was averted when Sampson's coup collapsed a few days later and Makarios returned to power. Also, the Greek military junta in Athens, which failed to confront the Turkish invasion, fell from power on 24 July. The damage to Turkish-Greek relations was done, and the occupation of Northern Cyprus by Turkish troops would be a sticking point in Greco-Turkish relations for decades to come.