Cyprus Peace Operation
Turkish government reacted severely to coup against Makarios. The fact that an authority like Makarios declared Turks were threatened with annihilation in the UN Security Commission set Turkey, one of the guarantor states, on the move. The Board of Ministers convened on 15 July 1974 and gave Prime Minister Bülent Ecevit full authority to take any sort of measure regarding the interests and security of the country.
Meanwhile, clashes continued in Cyprus. The coupists declared martial law in the whole island and soon captured Nicosia and Girne. Nikos Sampson announced that a "Hellenistic Republic" was founded in Cyprus and thereby took a considerable step toward the path to "enosis". Makarios who was flown from the island by England stated that Cyprus was invaded by Greece.
Concerned about the developments, Turkey contacted England, USA and USSR and communicated its reaction. On the other hand, Turkish Grand National Assembly convened out of ordinary upon the summons of President Fahri Korutürk 17 July 1974. Prime Minister went to London the same day and tried to convince the English government for joint intervention but failed to do so. It also submitted a motion at BM level to condemn USSR and Greece, which was vetoed by the USA. Nevertheless, USA assigned Vice Secretary of State Joseph Sisco to carry out talks in London, Ankara and Athens to solve the dispute in peaceful terms. Prime Minister Bülent Ecevit met Sisco on 18 July and through him gave Greece a ultimatum that included Turkey's requests. The ultimatum demanded that Nikos Sampson quit Cyprus Presidency, 650 Greek officers in the Cyprus National Guardsmen Organization withdraw and a sound warranty be issued for the independence of the island. The junta in Greece was convinced that Turks would not be able to use force due to America's pressure and thus rejected these demands.
source :
http://www.kibris.gen.tr/english/peacecamp/index.html