Rebel victory[5] Southern Front[18] Unknown 800–1,200+[29] Foreign intervention in behalf of Syrian rebels U.S.-led intervention against ISIL The Daraa offensive (March–April 2016) was a military operation of two groups allegedly affiliated with the Islamic State of Iraq and the Levant, the Yarmouk Martyrs Brigade and the Islamic Muthanna Movement, against Syrian opposition forces in the Daraa Governorate.

[23] ISIL forces also began to besiege al-Nusra Front and Ahrar ash-Sham troops in the villages of Saham al-Jawlan and Heit al-Latin.

[1] On the same day, ISIL forces detonated a suicide car bomb in Kherab Shahen,[39] and targeted Tel Jomo with heavy machine guns and mortars.

[8] The next day, Islamic Muthanna Movement fighters blew up the bridge linking Jalin, their main base, and Muzayrib in order to hinder opposition reinforcements from attacking their core area.

On the same day, al-Nusra Front and other Islamist rebel reinforcements entered Zayzoun, Tal Shehab and Sahem al-Golan, and launched a counterattack on Tasil.

[14] Around 100 isolated ISIL fighters,[30] belonging to the al-Nusra splinter group "Ansar al-Aqsa",[12] also entrenched themselves in Inkhil, in the northern part of Daraa Governorate.

[30] Although these ISIL fighters had already been in conflict with local rebel groups for some time,[17] the Hamza Division, the Mujahideen of Hawran Brigades and al-Nusra expelled Ansar al-Aqsa from Inkhil, soon after the offensive's beginning.

[44] The next day, the Military Council of Jasim declared it would prosecute any group or elements in the city that belong to the Yarmouk Martyrs Brigade or the Islamic Muthanna Movement in response to the ISIL offensive.

In the morning, Southern Front units recaptured the strategic hilltop of Tal Samin, which overlooks Tasil, from the Islamic Muthanna Movement.

[46][47] Ahrar ash-Sham units in Hayt announced they had successfully driven off a major ISIL attack on the town, killing "dozens" of enemy fighters.

[16] On the same day, the Islamic Muthanna Movement fragmented, as its eastern elements in Daraa city defected and formed the independent, pro-opposition "al-Murabitin Brigade".

According to local activists, the region is “on the brink of a humanitarian disaster.”[32][37] On 31 March, Syrian opposition forces launched yet another counter-attack in an attempt to recapture Tasil and Sheikh Saad, suffering several casualties.

[50] On 1 April, rebel forces managed to gain control of some parts of Tasil in course of a fierce battle with the Yarmouk Martyrs Brigade and the Islamic Muthanna Movement.

[26] In course of the battle, a prominent Yarmouk Martyrs Brigade commander was killed: Abu Tahrir, a Jordanian who had defected from the Syria Revolutionaries Front in 2015.

[55] After losing most of its territory and suffering from the defection of its eastern branch, there were reports that the Islamic Muthanna Movement would merge with the Yarmouk Martyrs Brigade under the latter's leadership.

[7] On 3 July, clashes broke out in Inkhil between Southern Front groups and ISIL sleeper cells, leading al-Masdar News to speculate that remnants of Ansar al-Aqsa remained active in the town[57] despite having been officially expelled during the offensive.