• Rebels with the group Hay’et Tahrir al-Sham (HTS) have seized control of large parts of Aleppo, one of Syria’s largest cities, after a surprise offensive this week.
  • The renewed fighting in Aleppo marks a new phase in Syria’s long-running civil war, which began in 2011 during the Arab Spring protests.
  • The forces of Syrian President Bashar al-Assad had previously held Aleppo, with the support of allies in Iran, Russia and Lebanon’s Hezbollah.
  • Russia has responded to the rebel offensive with air strikes, though its military resources are expected to be stretched thin due to its continuing war in Ukraine.