Fighters from Hezbollah and Iraq’s Shiite militias have deployed to Syria to support government forces, but it’s unclear if they are capable of turning the tide.

Even as Israel bombarded Syria, officials say the U.S. and Gulf countries were working to weaken its president’s alliance with Tehran. Rebels’ shock advance has dampened those hopes.

Iranian Foreign Minister Abbas Araghchi said Tehran is open to the possibility of sending troops to Syria to help President Bashar al-Assad's forces after a major offensive by rebels. "If the Syrian government asks Iran to send troops to Syria,

Iran has thrown its support behind Syria's government after thousands of insurgents took control of the country's largest city of Aleppo.

In just a few days, a patchwork of rebel forces has seized control of a broad stretch of land in the west and northwest of Syria. But it’s unclear just how much support Syria’s weakened allies can provide.

Time and time again the Assad dynasty has survived internal and external challenges and lived to fight another day. But nothing lasts forever.

Hundreds of fighters from Iran -backed Iraqi militias have crossed into Syria to help the regime of Bashar al-Assad fight off an insurgency across much of the northwest of the country, which has seen the seizure of the second city of Aleppo.