It was part of a secret deal.
Strange History: 50 German Focke-Wulf FW 190 Fighters Were Buried in Turkey and Are Still There
The export order of the Fw 190A-3s was completed between July 1942 and March 1943.
Around fifty examples of Focke-Wulf Fw 190, one of the best fighters flown by the Luftwaffe (German Air Force) during World War II, could have been buried in Turkey almost seventy years ago.
The news was recently reported by Hurriyetdailynews.com which states that over fifty Fw 190A-3 warbirds have been buried under the former airport of the Kayseri Province, located in the Central Anatolia region, since 1947.
Actually 72 Focke-Wulf Fw 190A-3s were delivered by Germany to Turkey as a result of a barter deal whereby Germany would provide these fighters to modernize the Turkish Air Force in exchange for chromium and high-grade iron badly needed by the German arms industry.