The north-west is dominated by the Islamist militant group Hayat Tahrir al-Sham (HTS), but Turkish-backed rebel factions - known as the Syrian National Army (SNA) - also control territory there with the support of Turkish troops.

Syria’s civil war is back in the spotlight after a new rebel coalition launched a surprise attack, sweeping into the country’s second largest city, Aleppo.

A surprise offensive by rebel forces opposed to Syrian President Bashar al-Assad's regime has led to a new round of fighting in a largely static civil war.