Is there any feud between Turkey and Syria?

The reason is that Syria was once a subordinate country of Turkey, but after the defeat of the Ottoman Empire after World War I, it abandoned many areas including Syria, parts of Eastern Europe and the Middle East and North Africa. In the end, Turkey became independent and Syria became the trusteeship of western countries, so both Turkey and Syria evolved from a part of the disintegrated Ottoman Empire. Syria is even worse than Turkey, because Turkey is basically an independent country, and the borders of Syria are randomly divided by Britain and France on the map.