Following the invasion of Cyprus by Turkey in 1974 as a response to the Greek junta orchistrated coup against Makarios both countries were at the verge of open warfare.
Greek submarines were sent towards Cyprus with orders to attack the invasion fleet, recalled, then resent, then recalled, etc.
Greek fighters were stationed in Crete, loaded with bombs and ordered to attack the Turkish invasion forces, but were recalled as well.
Tensions grew along the land border in Thrace.
In the end nothing happened. Greek reinforcements materialized only in a couple of hundred special forces troops sent, many of whom were shot down by Greek cypriot AAA, not being informed of their arrival.
So what if open warfare commenced in 1974?
What if Greece and Turkey engaged in full combat?
Did the Greeks stand a chance against Turkey or would this simply result in all of Cyprus being overrun and Greece probably losing an island or two in the Aegean to a further Turkish invasion?
Or would the US&NATO quickly step in, fearing this would get out of hand in the middle of the Cold War and simply reinstate the status quo before the Cyprus invasion?
What would the Soviets do?