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.

As Syrian and Russian jets continue pounding targets, two airstrikes hit a group of four hospitals and the health directorate building in Idlib city, according to the Syrian Civil Defense that operates in opposition-held areas,

Russia and Iran have offered military and diplomatic support to the Syrian government as it tries to stanch a major rebel advance.