delayed by an arms embargo following the Turkish invasion of Cyprus. These aircraft equipped 161 Filo (Squadron) at 6 Ana Jet Us (Jet-aircraft air Base, also called JAB). After re-equipping with F-16Cs these Phantoms were sent to 7 JAB for 171 and 172 Filo. Filo 173 at the same base was the Operational Conversion Unit. Peace Diamond III was an additional phase of the plan to reinforce the THK, always striving to keep a balance with the Greek Hellenic Air Force, because even though both are NATO countries, Greece and Turkey are historical enemies and there have been air clashes over the Aegean Sea between them. Filo 111, 112, 113, all based on JAB 1, Eskişehir, were the new Phantom units. The 111th and 112th Filo received 32 F-4Es replacing their aging F-100s. The 113 Filo replaced their even older RF-84Fs with eight RF-4Es. With this last batch of F-4s and plans to acquire F-16 Fighting Falcons, the THK was quickly being modernized. Before these aircraft arrived the THK had operated fighters such as the F-104 Starfighter, F-100 Super Sabre, F-84 Thunderflash and the F-86 Sabre, plus the economical F-5 Freedom Fighter. With 80 Phantoms on order, the strength of the THK was increased to new levels. Other fighters, seen as supplemental to the F-4E, were purchased as well. These included 40 Aeritalia F-104Ss, the improved Starfighter, with the same missiles and engines as used on the Phantoms. These equipped Filo 142 and 172. Compared to the F-4s they were considerably less expensive and were used as interceptors. The Turkish F-4 fleet was enhanced with 15 secondhand US aircraft delivered in 1981 to Filo 173 and finally, another 15 delivered in 1984 to replace fleet losses. Peace Diamond IV was another program to reinforce the THK and was carried out between June and October 1987. Under this program 40 F-4Es were delivered to 131 and 132 Filo, 3 JAB, Konya. Before that, this wing was only a training unit equipped with the last Turkish F-100s. After the conversion it became an operational formation. Turkey assisted in Desert Storm without entering the fighting directly, by opening their airbases to the Coalition air forces and hosted Belgian Mirages, German Alpha Jets and Italian F-104Gs. As a reward for their help another 40 former US Air Force Phantoms were delivered to 112 and 172 Filo, beginning on 25 March 1991. At that time,