On 30 May, ISIL launched an offensive towards the Syrian government-controlled part of Hasakah, and advanced in the city's outskirts after two suicide bombers targeted Syrian Army positions, killing and wounding 50 soldiers. The offensive originated from the ISIL-held town of
Al-Shaddadah, south of Hasakah, and was the jihadist organizations's third assault on the city in 2015. The same day, two ISIL suicide bombers attacked military positions near Hasakah. One of them drove a tanker, killing nine soldiers. On 1 June, ISIL launched its second attack on Hasakah by firing a barrage of mortar shells and rockets toward the city center, followed by a ground assault on the villages of Al-Dawoudiyah and Rad Shaqra. Eventually, the militants breached Syrian Army fortifications at the Al-Ahdath Central Prison, near Al-Dawoudiyah, capturing the southeastern sector of the facility. After Syrian government reinforcements arrived, the Syrian Army was reportedly able to recapture areas of the prison. On the morning of 2 June, ISIL took control of the southern perimeter of Al-Dawoudiyah. Meanwhile, Syrian government forces reportedly expelled ISIL fighters from Rad Shaqra. The next day, it was reported a newly formed pro-Syrian government
Assyrian militia, called the Gozarto Protection Forces, had arrived from
Qamishli to reinforce Syrian government troops. On 4 June, the Syrian government sent more reinforcements to Hasakah. By this point, ISIL was in control of the Panorama checkpoint, al-Ahdath prison, three villages, including Al-Dawoudiyah, and the city's electricity company, bringing the jihadists within less than 500 meters of Hasakah. The advances came after an ISIL assault using six suicide bombers, including five against the prison. A total of 11 suicide bombers hit Syrian government positions since the start of the offensive. The next day, ISIL used
howitzer artillery against Syrian Army positions near Mount Kawkab. That night, after not getting involved since the start of the offensive, the YPG started fighting ISIL, on the western outskirts of the northern part of the city that they control. Kurdish involvement began after they were criticised by city figures for not defending Hasakah, and were subsequently recognised as "a primary combat force in the city" after several meetings. Later, the Syrian Army continued its counterattack, and recaptured the villages of Al-Watwatiyah and Al-Mishtal Al-Zura’yy, pushing ISIL back up to 2 kilometers from the city. Clashes continued near the prison On 8 June, the Syrian Army continued its counterattack and reportedly recaptured the village of Aliyah, thus creating a 12 kilometer buffer zone around Hasakah city. The same day, the Syrian Army was declared "triumphant" in their defense of the city by the pro-Syrian government
Al-Masdar News. == Aftermath ==