US Deploys Troops Along Syria-Turkey Border
“The Turkish airstrikes also wounded 18 members of the U.S.-backed People’s Protection Units, or Y.P.G., were criticized by both the U.S. and Russia. The YPG is a close U.S. ally in the theatrical fight against the Islamic State (whose real purpose is destabilizing the Assad regime); it is seen by Ankara as a terrorist group because of its ties to Turkey’s Kurdish rebels. The problem is that Turkey is also an ally of the US, although over the past two years relations between Turkey and all western NATO allies have deteriorated substantially for numerous familiar, and extensively discussed in the past, reasons.
On one hand, further clashes between Turkish and Kurdish forces in Syria could potentially undermine the U.S.-led war on the Islamic State group. On the other, it risks taking an already unstable situation in Syria and escalating it substantially, should Turkey again find itself invading Turkey and/or Iraq.
Which is why the US appears to have deployed troops along the border: to serve as a deterrent to further Turkish attacks.”