The Syrian military is coordinating with its various international allies to launch sweeping counterattacks against the rebel militias that captured Aleppo last week in a surprise offensive. Iranian-backed militia from Iraq have entered the conflict to support the Syrian efforts to maintain President Bashar Assad’s regime.

Islamist rebel group Hayat Tahrir al-Sham launched a lightning assault against pro-Assad forces in Aleppo. Here’s who else is fighting in Syria’s civil war.

Iran called for countries around the world to confront “terrorism.” Iran means that HTS and other anti-regime groups in Syria are “terrorists.” Iran backs Hamas, which is also a terrorist group.