The Turkish President Erdogan offered the U.S. "Turkmen" troops to take the Syrian-Turkish border region currently held by the Islamic State. In return he demanded that the U.S. stop its support for the Syrian-Kurdish YPG group that also fights the Islamic State. Erdogan's new demand comes on top of the long standing plan to create a "safe zone" in north Syria in which refugees and "rebels" would be kept safe under a Turkish artillery and U.S. air umbrella.

Over the last two weeks "Turkmen" (Turkish special forces, Turkish volunteers and some Uighur fighters) together with al-Qaeda and some Syrian "rebels" proceeded from the Azaz area towards east along the Turkish-Syrian border. With Turkish cross-border artillery support and U.S. A-10 ground attack air support they managed to take a dozen Syrian villages from the Islamic State. They also captured the important Al-Rai border station.

But the Islamic State counterattacked, reoccupied Al-Rai and today cut off some of the attacking "rebel" forces from their support area around Azaz (black arrow).

Here is a map of the current situation in north Syria.
syria

In yellow shade the YPG held enclave around Efrin. In red the Syrian government held area around Aleppo city. In green the al-Qaeda and "rebel" held areas. The northern part around Azaz next to the Turkish border is the current point of action. The dark blackish areas are held by the Islamic State.

One can see the corridor next to the Turkish border which the Islamic Sate managed to cut today. It took several villages and a refugee camp that was established on the Syrian side. The refugee camp was then shelled by Turkish artillery to again drive out the Islamic State.

This attack demonstrates that the idea of "safe zones" in norther Syria is nonsense. Such "safe zones" would be major battle ground and would be attacked, as today, from two sides. They are indefensible. On top of that Erdogan's "Turkmen" have proven to be less capable than the YPG Kurds who have withstood similar attacks by the Islamic State.

Further south the Syrian army is near closing the corridor into eastern Aleppo city which is held by al-Qaeda (Jabhat al-Nusra) fighters. This "squeezing" and several other operations, marked with red arrows on the map, are in preparation for a large Syrian army attack along several axis in Aleppo governate and in Aleppo city.

Meanwhile hawks in the CIA and Pentagon want to turn the fighting in Syria into a campaign against the Russians. They want to provide serious anti-air capabilities to al-Qaeda and its "rebel" allies should the current cessation of hostilities not hold:
Officials said the CIA has made clear to its allies that the new systems, once agreed upon, would be given to the rebels only if the truce and the concurrent political track toward a lasting peace—Plan A—fall apart and full-scale fighting resumes.
I consider that to be a CIA offer to the "rebels": Break the ceasefire and you will be rewarded with better quality weapons.

One can only hope that the Obama White House, which earlier had rejected a proxy war with Russia, will therefore also reject this lunatic scheme.