Al-Qaeda is creating its most powerful stronghold ever in north-west Syria at a time when world attention is almost entirely focused on the impending defeat of Isis in the east of the country. It has established full control of Idlib province and of a vital Syrian-Turkish border crossing since July. “Idlib Province is the largest al-Qaeda safe haven since 9/11,” says Brett McGurk, the senior US envoy to the international coalition fighting Isis.
The al-Qaeda-linked movement, Hayat Tahrir al-Sham (HTS), which used to be called Jabhat al-Nusra, has long been the most powerful rebel group in western Syria. After the capture of east Aleppo by the Syrian army last December, it moved to eliminate its rivals in Idlib, including its powerful former Turkish-backed ally Ahrar al-Sham. HTS is estimated to have 30,000 experienced fighters whose numbers will grow as it integrates brigades from other defeated rebel groups and recruits young men from the camps for Internally Displaced Persons (IDPs) who have sought refuge in Idlib from President Bashar al-Assad’s forces.
Al-Qaeda is growing in strength in and around Idlib province just as Isis is suffering defeat after defeat in eastern Syria and Iraq. Its latest setback was its failure on Tuesday to stop the Syrian army linking up with its enclave at Deir Ezzor, where Isis has been besieging the government held part of the city for three years. Divided by the Euphrates, the city is the…