Who are the main players in the Syrian war? | The Syrian War

Syrian opposition forces led by the Hayat Tahrir al-Sham group launched a surprise offensive, ousting government forces from Aleppo and taking control of the city for the first time in eight years. HTS is one of the many armed groups involved in the fight for Syria’s future. Al Jazeera’s Saba Al-Kasim breaks down the key players on the frontlines.