The US and its allies were relying on Harakat Hazm and the Syrian Revolutionary Front to become part of a ground force that would attack the Islamic State of Iraq and the Levant (Isil).

For the last six months the Hazm movement, and the SRF through them, had been receiving heavy weapons from the US-led coalition, including GRAD rockets and TOW anti-tank missiles.

But on Saturday night Harakat Hazm surrendered military bases and weapons supplies to Jabhat al-Nusra, when the al-Qaeda affiliate in Syria stormed villages they controlled in northern Idlib province.

The development came a day after Jabhat al-Nusra dealt a final blow to the SRF, storming and capturing Deir Sinbal, home town of the group’s leader Jamal Marouf.