Saudi Crown Prince Mohammed Bin Salman is sending his forces to replace the U.S. troops.
Now let’s consider the brilliance of this move.
First, remember Turkish President Recep Erdogan was the antagonist in the Kashoggi matter and Erdogan orchestrated the blame toward Saudi Crown Prince MbS. There is no better motivated mid-east ally to protect the Kurds against any military action by Turkey other than MbS. No doubt MbS and UAE will send their best forces.
Secondly, what military equipment will MbS and the UAE be shipping along with their military troops? Those would be military purchases directly from the U.S.
Third, who stood up against international pressure and refused to condemn MbS over the Kashoggi matter? That would be a strategic U.S. President Trump. MbS owes a favor; see how that works?
Fourth, what leverage does U.S President Trump have toward Turkey in order to further facilitate no hostile action? That would be the economic leverage of current sanctions against Iran; and the option of controlling/punishing any economic engagement therein.
So to summarize: President Trump withdraws U.S. troops from Syria, and leverages his relationship with MbS to step up to replace them, thereby eliminating any concern that Turkey might take hostile action toward our Kurdish allies in Northern Syria.
Our troops come home; and a stable transition is ensured by a regional ally.
How do you like them apples!