Following a decade of Cypriot intercommunal violence and the coup in Cyprus on 15 July 1974 staged by the EOKA B paramilitary organisation, which overthrew President Makarios and installed the pro-Enosis (union with Greece) Nikos Sampson as dictator, Turkey invaded Cyprus on 20 July 1974 by unilaterally exercising Article IV in the Treaty of Guarantee (1960), but without restoring the status quo ante at the end of the military operation. In 1983 the Turkish Republic of Northern Cyprus, which is recognised only by Turkey, was established. The Annan Plan for reunifying the island was supported by the majority of Turkish Cypriots, but rejected by the majority of Greek Cypriots, in separate referendums in 2004. However, negotiations for solving the Cyprus dispute are still ongoing between Turkish Cypriot and Greek Cypriot political leaders.