Turkey is a member of NATO (the why of that escapes me). That’s all the pretext that’s required.
Wasn't it because of the US base at Incirlik that helped defeat the Soviet Union in the Cold war? Turkey has been a great ally it is just the recent election of Erdogan and Turkey's slide towards religion instead of secular leaders like Ataturk that has created the problem. But it seems like Turkey is helping the West topple Assad so they are still helping out.
My belief is that before any attack on Iran commences Syria has to be disabled to prevent damage to Israel. But that is pure conspiracy theory and conjecture at this point.
“Turkey is a member of NATO (the why of that escapes me” ...