Rebel victory Army of Conquest[1] Syrian Arab Republic Abu Kamal[5](Ahrar ash-Sham Central Area Commander) Abu Jamil Yusuf al-Qutb †[2](Ahrar ash-Sham deputy leader) Hassan al-Khalifa †[2](Omar al-Farouq Brigade commander)Abu Abdullah Taoum †[6](Ajnad ash-Sham leader) 5,000–7,000 fighters[12] Foreign intervention in behalf of Syrian rebels U.S.-led intervention against ISIL The 2015 Idlib offensive refers to a series of rebel operations in the Idlib Governorate, during the Syrian Civil War.

According to The Economist, the capture of Idlib came about largely because Gulf Arab states "gave more backing to their proxies despite American objections.

[9] By 5 April,[28] after a two-day battle, that was described as a “full-scale assault” on Mastouma,[29] the rebel attack on the military camp and village had been repelled.

[32] By 10 April, they had secured the approaches to Mastouma but halted their advance in the outskirts of the two villages after encountering stiff resistance from the rebels.

According to a military source, Air Force Intelligence intercepted the communications of local Al-Nusra Front commanders who were reportedly in panic over the collapse of their defensive line.

[39] By 18 April 349 air-strikes were conducted against Idlib city and its countryside since the rebel takeover of the provincial capital on 28 March.

[40] The same day, the military captured the village of Muqablah, linking up with NDF fighters in the southeastern part of Faylan,[41] and by 20 April advanced to Tell Zahir Al-Mufraq hill.