[23] In mid-March 2015, the YPG and the allied Euphrates Volcano (Burkān al-Furāt) forces, backed by Coalition air support, launched an assault towards Sarrin, which was considered the last major ISIL stronghold in the Kobanî countryside.

[24] On 25 April 2015,[25] Kurdish forces and their allies surrounded the town on three sides and pushed into its suburbs,[9][26] after breaching ISIL's defense lines.

[9] On 12 July, ISIL broke the siege in a counterattack, recapturing the village of Malhah, and reopening the supply route to the south of Sarrin.

[20] Later on the same day, YPG and FSA counterattacks halted the ISIL advance in the area, with YPG-led forces recapturing some of the lost villages.

[35] On 22 July, ISIL attempted to recapture Mitras and to cross the M4 Highway again; however, this attack was repelled by multiple US-led Coalition airstrikes and a YPG-led counterattack.

[36] On 23 July, multiple US-led Coalition airstrikes struck ISIL fortifications and troop concentrations inside of Sarrin and to the south of the town.

[37] On 24 July, YPG-led forces advanced again, crossing the highway and capturing the village of Malhah, once again cutting off ISIL's last supply route to Sarrin.

[21][38] It was reported that the Euphrates Volcano (Burkan Al-Firat) forces had been pounding Sarrin with artillery for the past week, and that ISIL shot at civilians who tried to leave the town.

[9] On the next day, YPG and FSA forces advanced further southward, capturing the village of Milhah, located to the south of Malhah, further securing the siege of Sarrin.

[9] On 26 July, ISIL militants holed up inside of the Sarrin Grain Silos blew up part of the structure, with the main tower collapsing from the detonation.

[43] Later on the same day, YPG and FSA forces were reported to have secured most of the southern portion of Sarrin, after heavy US-led Coalition airstrikes.

[48] On 29 July, the SOHR reported that violent clashes had erupted between the YPG and ISIL at the banks of the Euphrates River, near Sarrin, which resulted in casualties on both sides.

The attack was eventually repelled by Euphrates Volcano forces, and resulted in the deaths of 9 ISIL militants and 13 YPG fighters.

[51][9] On the night of 7 August, ISIL fighters on the western bank of the Euphrates River targeted Kurdish positions on the hilltops west of Sarrin with mortar fire.

[2][23] After the capture of Sarrin and the surrounding region, it was expected that ISIL attacks against villages in the Kobanî Canton would be curbed significantly.