The Pentagon said it would stay "as long as we need to," defying Syria, Russia and Iran, which see U.S. military presence as illegal.
As Syrian Kurds build ties with the government to cement their stake, Turkey’s role could threaten their leverage.
The two leaders share hugs and handshakes, heaping praise on the Russian military campaign supporting the regime, despite allegations of civilian deaths.
The conversation follows Syrian President Bashar al-Assad's visit to Sochi.
While the true cost of Russia's campaign in Syria remains up for debate, its given Moscow newfound influence in the Middle East and crucial warfighting experience.
Russian President Vladimir Putin said the West has exploited his country's goodwill and disregarded the sovereignty of countries around the world.
Major General Issam Zahreddine, who led his Syrian Republican Guard brigade for three years against an ISIS siege in Deir Ezzor, was reportedly killed by a landmine.
Syria's war is almost over and experts say the U.S. has few options to counter what's been a major victory for Russia, Iran and President Bashar al-Assad.
As Russia consolidates its position in Syria and the Middle East as a whole, it's reaching out to rivals and selling them a coveted weapon, the S-400.
The Syrian military's Fifth Assault Corps, known as "ISIS Hunters," has made ISIS an offer it can't refuse.
Two rivals are battling ISIS in the jihadists' final stronghold of Deir ez-Zor. One seeks to return Syria to its former self; the other wants more power for Kurds.
The U.S. has designated the Al-Qaeda affiliated a "terrorist" group, despite its attempts to rebrand. However Russia has repeatedly accused Washington of sparing its militants.
Syrian President Bashar al-Assad, his opposition, U.S.-backed Kurdish forces and the Islamic State militant group (ISIS) all recognized Eid al-Adha.
Once a primary recipient of CIA assistance, the Free Syrian Army has since turned on U.S. efforts to battle ISIS using Kurdish militias.
One of Syrian President Bashar al-Assad's closest advisers said many challenges still lie ahead, including reconstruction and the presence of foreign powers.
The 59th Damascus International Fair opens despite ongoing violence in the outskirts of the Syrian capital. It’s the first such event in five years.
After reportedly doubling their control of the country, Syrian troops conducted a nighttime raid behind enemy lines with the help of Russia.
Russia's latest meeting with Iran and Iraq signals a growing cooperation between the powers, and a decline in U.S. influence in the Middle East.
As forces supported by the U.S. and Russia defeat ISIS across Syria, Secretary of State Rex Tillerson seeks Moscow's help to prevent a new conflict.
Hafez al-Assad finished in the lower end of the International Mathematical Olympiad in Rio de Janeiro.
Syria’s President Bashar al-Assad made a series of public appearances, surrounding himself with military officials and supporters amid U.S. threats.
A threat of military action against Syria's Bashar al-Assad caught many military officials off guard.
The Syrian Civil Defense, aka the White Helmets, have received global recognition for rescue efforts, but also have been accused of supporting rebels.
In a departure from previous French policy, President Emmanuel Macron endorsed Russia and Syria’s war against ISIS.
Former U.S. Ambassador to Syria Robert Ford said President Barack Obama left his successor with little option but to ultimately withdraw.