Bashar al-Assad's army objects to any form of U.S. presence in the country and will seek to put an end to it.
Gen. Joseph Dunford called his Russian counterpart following a swarm drone attack on a Russian air base in Syria.
Russia said drone attacks on its bases in Syria would have required help from a country with satellite navigation technology.
The Iranian people "aren't buying" the regime's act, Defense Secretary Jim Mattis said.
They watched U.S. fighters bring their A-game and paid attention to tactics. And once more, they learned.
A coalition commander said Wednesday that ISIS fighters were untouched in Syrian regime territory.
Syria's peace efforts cannot include President Bashar Assad, Turkey's leader said Wednesday.
The fighters remaining in the region continue to fall, according to estimates from Combined Joint Task Force-Operation Inhere...
"Anywhere you look across all the Syrian fault lines, Moscow has positioned itself as a key player."
Mattis said the U.S. and Russia are still using a phone line to coordinate flight movements over crowded Syrian skies.