Turkey is and has been our enemy since the first Gulf war when they refused to allow over flights and it caused many U.S. military deaths.
Hey Turkey, F.U.
The overflights were transport from Germany to Saudi Arabia. The shortest route is over Turkey. We shifted west, but that did not cause any deaths.
When the Iraqis started launching Scuds against Israel, we convinced the Turks that they were next. So, they went along with us launching anti-Scud missions from the Incirlik air base.
The biggest obstacle Turkey put up is that initially, our military planners wanted to land an infantry division in Turkey and position it along the Northern Iraq border. That division was already floating around in the Med Sea. Turkey refused. I would think the first gulf war would have proceeded differently, especially for the Kurds, with an infantry division in the north.