program by ordering 40 Dassault Mirage F.1s and a total of 56 F-4Es along with six RF-4Es. The final batch of 40 F-4Es were cancelled when a PASOK government was elected in 1981. The first 18 Greek Phantoms entered in service in 1974, partially funded by U.S. military assistance under "Operation Icarus". However, they did not enter service in time to fight in the Turkish invasion of Cyprus in 1974. A second batch of F-4Es plus two extra aircraft were delivered in 1976, followed by a final batch in 1978–79. The first units equipped were the 339th Squadron in 1974 in the air-to-air role and also as the operational training unit; and the 338th Squadron, in 1975 in the ground-attack role. The 337th "Ghost" Squadron was equipped in 1978, giving up their Northrop F-5As. The 348th "Eyes" Squadron relinquished their RF-84Fs for new RF-4Es in 1979. The old RF-84Fs were retained until 1990 for training purposes. The last batch of 40 Phantoms was not delivered due to the political situation in Greece, but with the Iraqi invasion of Kuwait and the US-led Operation Desert Storm liberation, the situation changed. The USAF phased out many older aircraft and some were supplied to the PA as a thank-you for the use of Greek airbases during the war. These included 10 ex-Indiana Air National Guard aircraft, later followed by another 18. By 1992, there were four squadrons equipped with 73 F-4Es and 5 RF-4Es: the 348th and 337th squadrons in Larissa with the 110th Combat Wing, and 338th and 339th squadrons at Andravida with the 117th Combat Wing. There were many differences between the batches supplied to the Hellenic Air Force. The 338th "Ares" Squadron had an air-to-surface role. Their F-4Es were equipped with digital processors for the APG-120, laser inertial navigation systems, digital data buses, smoke-reduction systems and various structural improvements. The 339th "Ajax" Squadron was employed in the air defense role with the older Phantoms, which had a Radar Warning Receiver mounted on the tail and air intakes, and the TISEO optical device. Upgrades and further developments One of the first measures taken by the PA was to increase the number of reconnaissance RF-4Es in their fleet, to augment the existing six. They were able to do this in 1993 when the Luftwaffe phased out their RF-4Es, and 29 ex-Luftwaffe aircraft were added to the 348th Mira. This last batch brought