Moscow is studying the remains of Tomahawk rockets to exploit their weaknesses.
An Iranian Revolutionary Guards official said his forces were in Iraq and Syria legally, and "if anyone should leave the region, it would be the meddlesome U.S."
A New York Times report revealed the battle between the U.S.-led coalition and pro-Syrian government fighters in dramatic detail.
Israel first occupied Syria's Golan Heights during the 1967 Six-Day War and annexed it in 1981 without international recognition.
The Iranian military's chief of staff said America "is a disloyal, atrocious, criminal, isolated, angry enemy with disloyal, corrupt leaders."
Iran's Foreign Ministry said "No one can force Iran to do anything" and it would stay in Syria as long as it was welcome.
Putin said that a new political phase will follow "the significant victories and success of the Syrian army."
In his second known trip since 2011, Syrian President Bashar al-Assad told Russian President Vladimir Putin that "stability is improving."
Russian warships and submarines don't only target ISIS and other Syrian insurgents, but also provide a cover against NATO's southern flank in Europe.
China's envoy to Syria said he saw "huge space" to expand support for Russia and its role in Syria's seven-year civil war.
Like Israel, Saudi Arabia was one of the few nations to welcome Trump's decision to withdraw from the Iran nuclear deal.
Hours after the Israeli military urged citizens to take shelter and President Donald Trump left the Iran deal, new strikes were reported in Syria.
An Israeli minister and Cabinet member said Syrian President Bashar al-Assad's continued support for Iran "will spell his end."
In order for Russia to extend its influence in Syria to Lebanon, it will have to mediate a greater conflict between Iran and Israel.
Engine trouble is currently believed to have caused the deadly crash at sea.
North Korea is an ally of Syria, Cuba and other fellow enemies of U.S. foreign policy, but peace may be on the horizon.
As the Syrian military and its allies advance on the ISIS' last stronghold south of Damascus, the jihadis' tactics grow more bloody.
Israeli Prime Minister Benjamin Netanyahu was granted the power to go to war with only his defense chief's approval in "extreme situations."
The Syrian Observatory for Human Rights believed Israel was likely responsible for the attack.
Syrian military positions in southern Hama were reportedly attacked as international tensions mounted.
Syrians must return home and prove property ownership by May 11.
The U.S.-led coalition and the axis of Russia, Iran and Syria both claim Iraq as an ally—and Baghdad may be the key to bringing them together.
Moscow has repeatedly hinted it could send some of its most advanced air defense systems to Syria.
Eliot Higgins, the man behind Bellingcat, talks to Newsweek about Syria, chemical weapons and Russian disinformation.
ISIS has agreed to surrender its final stronghold south of Damascus, but the Syrian military and allies continue to fight until talks are finalized.