 Complete the following phrase:  Tension began in 1963 when Makarios proposed thirteen amendments to the constitution of the Republic of Cyprus. Turkish Cypriots were opposed to the proposal since they viewed it as an attempt to remove their constitutional safeguards that Greek Cypriots had claimed to be problematic in the conduct of government. On 21 December 1963, clashes between Greek Cypriots and Turkish Cypriots erupted unleashed a wave of violence across the island. Facing violence from Greek Cypriot paramilitaries, in favour of unification with Greece Enosis, thousands of Turkish Cypriots fled their properties to enclaves with Turkish Cypriot majorities, protected by Turkish troops. By 1974, an attempted coup sponsored by the military Greek military junta of 1967-1974 then ruling Greece, trying to overthrow the Cypriot government and unite the island with Greece, was met with a military 